English Grammar & Syntax Quiz: Fixing Fragments
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Fixing FragmentsQuestion 1 of 10

Researchers initially dismissed the fluctuations. Because the sensors had been calibrated under laboratory conditions rather than at sea.

Which revision most effectively fixes the fragment while preserving the intended causal relationship?

Researchers initially dismissed the fluctuations because the sensors had been calibrated under laboratory conditions rather than at sea.
Researchers initially dismissed the fluctuations; because the sensors had been calibrated under laboratory conditions rather than at sea.
Because the sensors had been calibrated under laboratory conditions rather than at sea; researchers initially dismissed the fluctuations.
Researchers initially dismissed the fluctuations, the sensors having been calibrated under laboratory conditions rather than at sea.
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English Grammar & Syntax Quiz

English Grammar & Syntax Quiz: Fixing Fragments

Practice Fixing Fragments in English Grammar & Syntax with focused quiz questions that help you check what you know, review explanations, and build confidence with test-style prompts.

What this quiz covers

This quiz focuses on Fixing Fragments, giving you a quick way to practice the rules, question types, and explanations that matter most for English Grammar & Syntax.

How to use this quiz

Try each quiz question before looking at the correct answer. Use the explanations to review missed ideas, then come back to similar questions until the pattern feels familiar.

All questions

Question 1

Researchers initially dismissed the fluctuations. Because the sensors had been calibrated under laboratory conditions rather than at sea.

Which revision most effectively fixes the fragment while preserving the intended causal relationship?

  1. Researchers initially dismissed the fluctuations because the sensors had been calibrated under laboratory conditions rather than at sea. (correct answer)
  2. Researchers initially dismissed the fluctuations; because the sensors had been calibrated under laboratory conditions rather than at sea.
  3. Because the sensors had been calibrated under laboratory conditions rather than at sea; researchers initially dismissed the fluctuations.
  4. Researchers initially dismissed the fluctuations, the sensors having been calibrated under laboratory conditions rather than at sea.
Explanation: When you spot a sentence fragment on grammar exams, ask yourself: does this group of words contain both an independent clause and express a complete thought? A clause beginning with "because" is a subordinate clause — it can't stand alone. It needs to be attached to an independent clause to form a complete sentence. In the original passage, "Because the sensors had been calibrated under laboratory conditions rather than at sea" is stranded as its own sentence, which makes it a fragment. The fix is to attach it directly to the independent clause it modifies: "Researchers initially dismissed the fluctuations." The subordinating conjunction "because" signals a causal relationship, so the attachment must preserve that logical connection without adding punctuation that severs it. Choice A does exactly this — it joins the subordinate clause directly to the independent clause using "because" as the bridge, producing a grammatically complete sentence that clearly expresses cause and effect. This is the correct answer. Choice B places a semicolon before "because," which is a classic trap. Semicolons connect two independent clauses; using one before a subordinate clause is grammatically incorrect and doesn't fix the fragment. Choice C uses a semicolon after the subordinate clause, which creates the same error in reverse — a semicolon cannot properly separate a dependent clause from the independent clause it modifies. Choice D uses an absolute phrase construction ("the sensors having been calibrated..."), which technically avoids a fragment but introduces an awkward, ambiguous structure that weakens the direct causal relationship the sentence intends to express. Study tip: Whenever you see "because," "although," "since," or other subordinating conjunctions starting a sentence, check immediately whether it's attached to an independent clause — if not, it's a fragment waiting to be fixed.

Question 2

The committee postponed the vote. Hoping to obtain a more reliable cost estimate before Friday.

Which revision most logically and grammatically incorporates the fragment into the complete sentence?

  1. Hoping to obtain a more reliable cost estimate before Friday, the committee postponed the vote. (correct answer)
  2. Hoping to obtain a more reliable cost estimate before Friday, the vote was postponed by the committee.
  3. The committee, postponed the vote hoping to obtain a more reliable cost estimate before Friday.
  4. The committee postponed the vote; hoping to obtain a more reliable cost estimate before Friday.
Explanation: When you see a dangling fragment like this, ask yourself two things: what is the fragment doing grammatically, and what noun does it logically describe? "Hoping to obtain a more reliable cost estimate before Friday" is a participial phrase — it must attach to the subject it modifies, and that subject must immediately follow the comma. Answer A correctly places the participial phrase at the beginning, followed immediately by "the committee" — the logical actor doing the hoping. The sentence flows clearly: the committee hoped, therefore the committee postponed. This is both grammatically sound and logically coherent, making A the correct revision. Answer B is a classic dangling modifier trap. The phrase "Hoping to obtain..." is followed by "the vote," which means the vote appears to be doing the hoping — an absurdity. Passive constructions often create this problem because they push the true actor away from the modifier. Answer C inserts a comma between "committee" and "postponed," creating an illogical comma splice that disrupts the main clause; the phrase "hoping to obtain a more reliable cost estimate before Friday" is left awkwardly tacked on without clear grammatical attachment. Answer D uses a semicolon, which connects two independent clauses — but the participial phrase after the semicolon is still a fragment, not an independent clause, so the semicolon doesn't solve the original problem at all. A useful rule of thumb: whenever a sentence opens with a participial phrase ending in a comma, the very next word must be the noun performing that action. If it isn't, you have a dangling modifier — one of the most frequently tested errors on grammar exams.

Question 3

The team opened three trenches beside the foundation. To determine whether an earlier wall continued beneath the courtyard.

Which revision correctly uses the fragment to express the team's purpose?

  1. To determine whether an earlier wall continued beneath the courtyard, which the team opened three trenches beside the foundation.
  2. The team opened three trenches beside the foundation; to determine whether an earlier wall continued beneath the courtyard.
  3. The team opened three trenches beside the foundation, and to determine whether an earlier wall continued beneath the courtyard.
  4. The team opened three trenches beside the foundation to determine whether an earlier wall continued beneath the courtyard. (correct answer)
Explanation: When a passage contains a sentence fragment that expresses purpose, your goal is to attach it to the main clause in a way that is both grammatically complete and logically clear. A phrase beginning with an infinitive like "to determine" functions as a purpose adverbial — it answers why the action was taken — and it attaches directly to the verb it modifies without any punctuation separating them. That's exactly what D does. "The team opened three trenches beside the foundation to determine whether an earlier wall continued beneath the courtyard" flows naturally: the infinitive phrase "to determine…" attaches directly to "opened," expressing the purpose of the action. The sentence is complete, clear, and grammatically sound. The other options each create distinct problems. A uses "which" to introduce what should be the main clause, turning "the team opened three trenches" into a relative clause with no independent clause to anchor it — the sentence has no grammatical backbone. B uses a semicolon, which should only connect two independent clauses; "to determine whether an earlier wall continued beneath the courtyard" is a dependent phrase, not a stand-alone sentence, so a semicolon here is incorrect. C uses the coordinating conjunction "and," which joins equal grammatical units. A full independent clause ("the team opened three trenches") cannot be properly coordinated with a dependent infinitive phrase using "and" — the two parts aren't parallel. A useful strategy: whenever you spot a fragment beginning with "to + verb," ask yourself what action does this purpose belong to? Then attach it directly to that main clause — no punctuation needed.

Question 4

Several procedural details delayed the launch. Including a missing authorization signature and two sets of outdated coordinates.

Which revision correctly incorporates the examples into the sentence as details that caused the delay?

  1. Several procedural details delayed the launch, which included a missing authorization signature and two sets of outdated coordinates.
  2. Several procedural details delayed the launch; including a missing authorization signature and two sets of outdated coordinates.
  3. Several procedural details, including a missing authorization signature and two sets of outdated coordinates, delayed the launch. (correct answer)
  4. Several procedural details, including a missing authorization signature and two sets of outdated coordinates, and delayed the launch.
Explanation: When a sentence contains examples or elaborating details, those details must be grammatically attached to the main clause — they can't float on their own as a fragment. The original passage has exactly this problem: "Including a missing authorization signature and two sets of outdated coordinates" is a participial phrase, not a complete sentence, yet it's punctuated as one. The fix is to embed that phrase directly inside the main clause as a nonrestrictive modifier. Choice C does this correctly: "Several procedural details, including a missing authorization signature and two sets of outdated coordinates, delayed the launch." The phrase is set off by commas and sits between the subject and verb, clarifying which procedural details caused the delay — without breaking the sentence's grammatical backbone (subject + verb + object). Choice A goes wrong because the relative clause "which included a missing authorization signature..." attaches to "launch," making it sound like the launch included those details, not the procedural details. The reference is ambiguous and logically off. Choice B uses a semicolon, but a semicolon must join two independent clauses — "including a missing authorization signature and two sets of outdated coordinates" is still a fragment, so the semicolon doesn't solve the problem. Choice D adds "and" before "delayed the launch," which breaks the sentence's verb structure entirely and creates a grammatical mash-up with no clear predicate. Strategy tip: Whenever you see a participial phrase beginning with including, ask: is it attached to a noun it can logically modify? If it's dangling as a fragment or misattached to the wrong noun, look for the answer that tucks it neatly inside the main clause with commas.

Question 5

The final report emphasizes. That handwritten records were checked against the electronic inventory before any totals were published.

Which revision correctly attaches the content clause to the verb it completes?

  1. The final report emphasizes. That handwritten records were carefully checked against the electronic inventory before any totals were published.
  2. The final report emphasizes that handwritten records were checked against the electronic inventory before any totals were published. (correct answer)
  3. The final report emphasizes; that handwritten records were checked against the electronic inventory before any totals were published.
  4. The final report emphasizes the handwritten records. That were checked against the electronic inventory before any totals were published.
Explanation: When a verb like emphasizes takes a clause as its direct object, that clause must be joined directly to the verb — no punctuation should interrupt that bond. These are called content clauses (or noun clauses), and they typically begin with that. The word that acts as a subordinating conjunction, making the entire clause function as the object of the verb. Separating them with a period, semicolon, or any other break creates a fragment or a grammatical mismatch. Option B is correct because it removes all punctuation between emphasizes and that, allowing the noun clause ("that handwritten records were checked...") to serve seamlessly as the verb's object. The sentence now reads as one complete, unified statement. Option A fails for the same reason as the original: it keeps the period after emphasizes, turning the that-clause into a sentence fragment. Adding the word carefully doesn't fix the structural break — it just adds a modifier to a still-broken sentence. Option C substitutes a semicolon for the period, but a semicolon joins two independent clauses. The that-clause is not independent — it cannot stand alone — so a semicolon here is both grammatically wrong and still separates what should be connected. Option D restructures the sentence entirely by inserting a noun phrase ("the handwritten records") as the object, then stranding that at the start of a new fragment. This removes the noun clause altogether and creates a dangling relative clause with no proper anchor. Your takeaway: whenever you see that following a reporting or mental-activity verb (says, believes, emphasizes), check that nothing separates them — no period, no semicolon, no comma.

Question 6

After reviewing the revised drainage plan and consulting the county engineer. The permit was approved.

Which revision fixes the introductory fragment and makes clear who performed the reviewing and consulting?

  1. After reviewing the revised drainage plan and consulting the county engineer; the board approved the permit.
  2. After reviewing the revised drainage plan and consulting the county engineer, the permit was approved by the board.
  3. After reviewing the revised drainage plan and consulting the county engineer, the board approved the permit. (correct answer)
  4. After reviewing the revised drainage plan and consulting the county engineer. The board then approved the permit.
Explanation: When you spot a sentence fragment followed by a disconnected main clause, you're being tested on two skills at once: fixing the fragment and avoiding a dangling modifier. Both must be solved together for a revision to be correct. The original passage breaks after "engineer," turning the introductory phrase into a fragment. The fix is to attach that phrase to a main clause using a comma — but here's the critical part: whoever performs the action in the introductory phrase must be the subject of the main clause. The phrase "after reviewing... and consulting..." describes someone doing those actions, so the subject that follows the comma must be that same actor. Choice C — "After reviewing the revised drainage plan and consulting the county engineer, the board approved the permit" — does exactly this. The board reviewed, the board consulted, and the board approved. The sentence flows logically with no ambiguity. Choice A uses a semicolon instead of a comma after the introductory phrase. Semicolons connect two independent clauses, but "After reviewing..." is a dependent phrase, not an independent clause — so a semicolon is grammatically wrong here. Choice B attaches the introductory phrase to a passive construction ("the permit was approved by the board"), which creates a dangling modifier: grammatically, the permit appears to be doing the reviewing and consulting. Choice D keeps the period, leaving the introductory phrase as a fragment — the original problem is never resolved, just padded with the word "then." A quick strategy: whenever an introductory participial phrase opens a sentence, ask "who is doing this action?" — that person or group must be the grammatical subject immediately after the comma.

Question 7

Mara selected the oldest map. A linen-backed chart marked with several handwritten corrections.

Which revision best indicates that the second fragment renames the map Mara selected?

  1. Mara selected the oldest map—a linen-backed chart marked with several handwritten corrections. (correct answer)
  2. Mara selected the oldest map; a linen-backed chart marked with several handwritten corrections.
  3. Mara selected the oldest map and a linen-backed chart marked with several handwritten corrections.
  4. Mara selected the oldest map. Being a linen-backed chart marked with several handwritten corrections.
Explanation: When a noun phrase follows another noun and renames or describes it, grammarians call it an appositive. The key punctuation tool for connecting an appositive to the noun it renames is the em dash (or a comma), which signals "here comes more information about what I just mentioned." When you see a question asking how to show that one phrase renames another noun, think appositives first. Choice A is correct because the em dash connects "the oldest map" directly to "a linen-backed chart marked with several handwritten corrections," making it unmistakably an appositive — a renaming phrase that elaborates on exactly which map Mara selected. The em dash creates a smooth, tight relationship between the noun and its descriptor without suggesting a separate clause or action. Choice B uses a semicolon, which joins two independent clauses. Since "a linen-backed chart marked with several handwritten corrections" is not an independent clause, this punctuation is grammatically incorrect and fails to express the renaming relationship. Choice C inserts and, which turns the sentence into a compound structure implying Mara selected two separate things — the map AND the chart — rather than showing the chart is the same object as the map. This completely distorts the meaning. Choice D keeps the period, leaving the second phrase as a dangling fragment beginning with Being, which is a participial construction that still doesn't grammatically attach as an appositive and creates an awkward, unclear sentence. Study tip: Whenever a phrase renames the noun right before it, reach for an em dash or comma to introduce it — and eliminate any option that uses a semicolon (requires two independent clauses) or and (implies separate items).

Question 8

A set of field notes, which several historians had assumed was lost.

Which revision turns the fragment into a complete sentence without changing the identity of the subject?

  1. A set of field notes, which several historians had assumed was lost, was discovered in a courthouse basement. (correct answer)
  2. A set of field notes, which several historians had assumed was permanently lost in a courthouse basement.
  3. A set of field notes, having been assumed lost by several historians in the courthouse basement.
  4. A set of field notes, which several historians had assumed was lost, and the courthouse basement where it was discovered.
Explanation: When a sentence lacks a main verb or an independent clause, it's a fragment — and fixing one requires adding what's missing without distorting the original meaning. Here, the passage gives you a noun phrase ("A set of field notes") followed only by a relative clause ("which several historians had assumed was lost"). There's no main verb to complete the thought, so the sentence never actually says anything about the field notes. Choice A corrects this perfectly by adding the main verb "was discovered in a courthouse basement," giving the subject something to do. The relative clause stays intact as a modifier, and the subject — "A set of field notes" — remains unchanged. This is your complete, grammatically sound sentence. Choice B looks tempting but still produces a fragment. Adding "permanently" and relocating "in a courthouse basement" into the relative clause doesn't supply a main verb — the sentence still trails off without telling you what happened to the notes. Choice C swaps the relative clause for a participial phrase ("having been assumed lost"), which also cannot serve as a main verb. A participial phrase modifies a noun; it doesn't complete a sentence. The fragment problem remains. Choice D joins the original fragment to another phrase using "and," but both parts are still fragments — no main verb appears anywhere. Connecting two incomplete thoughts doesn't create one complete sentence. The strategy to remember: when fixing a fragment, ask yourself "What is the subject doing?" If you can't answer that question from the sentence, the main verb is missing. Always check that your revision supplies a complete predicate, not just more modifying phrases.

Question 9

That several samples had identical isotopic signatures despite being collected miles apart.

Which revision supplies the missing sentence element while retaining the original words as the grammatical subject?

  1. Several samples having identical isotopic signatures despite being collected miles apart, suggesting a shared geological source.
  2. Because several samples had identical isotopic signatures despite being collected miles apart from a shared geological source.
  3. The fact that several samples had identical isotopic signatures despite being collected miles apart from one another.
  4. That several samples had identical isotopic signatures despite being collected miles apart suggests a shared geological source. (correct answer)
Explanation: When a sentence lacks a main verb, it's a fragment — and that's exactly what's being tested here. The original passage opens with "That several samples had identical isotopic signatures...," which is a noun clause acting as the subject of a potential sentence. The problem is that nothing follows to complete the thought. A noun clause subject needs a predicate (a main verb + complement) to form a complete sentence. Answer D is correct because it appends "suggests a shared geological source" directly after the noun clause. Now "that several samples had identical isotopic signatures despite being collected miles apart" functions as the grammatical subject, and "suggests a shared geological source" serves as the predicate. The original words remain the subject, and the sentence is complete. Answer A converts the noun clause into a participial phrase ("having identical isotopic signatures"), which makes "several samples" the implied subject of a dangling modifier. The result is still a fragment — there's no main verb attached to an independent clause. Answer B adds "Because" at the start, turning the entire construction into a subordinate adverbial clause. A clause beginning with "because" cannot stand alone as a sentence; it requires an independent clause to attach to, which B never provides. Answer C replaces "That" with "The fact that," which is a common workaround for noun clauses — but the sentence still stops without a predicate. "The fact that..." simply restates the subject without providing a verb, leaving another fragment. Strategy tip: When you spot a sentence beginning with "That" followed by a clause, immediately ask yourself: where is the main verb? If the noun clause is the subject, the sentence must provide a predicate to be grammatically complete.

Question 10

Although the redesign reduced background noise. It also narrowed the instrument's useful frequency range.

Which revision fixes the fragment while preserving the contrast signaled by the subordinating conjunction?

  1. Although the redesign reduced background noise; it also narrowed the instrument's useful frequency range.
  2. Although the redesign reduced background noise, it also narrowed the instrument's useful frequency range. (correct answer)
  3. Although the redesign reduced background noise, but it also narrowed the instrument's useful frequency range.
  4. The redesign was successful, although it reduced background noise. Also narrowing the instrument's useful frequency range.
Explanation: When you spot a subordinating conjunction like although, your first instinct should be to ask: what does it attach to, and is the sentence structurally complete? Subordinating conjunctions create dependent clauses that must be joined to an independent clause — they cannot stand alone or be separated by a period. The original passage breaks after "background noise" with a period, turning the although clause into a fragment. It has no independent clause to complete it. The fix is to attach that dependent clause directly to the independent clause that follows, using a comma to signal the boundary between them. That's exactly what B does: "Although the redesign reduced background noise, it also narrowed the instrument's useful frequency range." The dependent clause flows into the independent clause, the contrast signaled by although is preserved, and the sentence is complete. A replaces the period with a semicolon, but semicolons connect two independent clauses — a dependent clause introduced by although can never stand alone on either side of a semicolon. This leaves the fragment problem unsolved. C doubles up on contrast markers by pairing although with but, which is redundant and grammatically awkward. You only need one conjunction to signal contrast; using both creates a structural conflict. D breaks the sentence into two pieces again, with "Also narrowing the instrument's useful frequency range" left as a dangling participial phrase — another fragment, just a different kind. Your takeaway: whenever a sentence opens with a subordinating conjunction, scan for the independent clause it must connect to. A comma — not a semicolon or period — is the standard bridge between them.