Active and Passive Voice - 8th Grade Writing

Section 1

Why Does Voice Matter in Writing?

Humans have been shaping sentences for thousands of years, and one of the oldest choices every writer makes is this: Who should be the star of the sentence? The answer to that question is what we call voice — specifically, active voice and passive voice. These two patterns aren't new inventions. People have studied them, argued about them, and taught them for centuries.

~350 BCE

The Greek philosopher Aristotle studied how language persuades people. He noticed that sentences feel stronger when the doer of an action comes first. This was one of the earliest observations about what we now call active voice.

~100 CE

Roman grammarians like Quintilian taught public speakers to choose their sentence structures carefully. Latin, like English, had both active and passive forms, and speakers learned when each one was more effective.

1700s–1800s

As English grammar books became common, teachers began labeling sentences as "active" or "passive." These terms helped students understand how the same idea could be expressed in two very different ways.

1918

Strunk & White's famous writing guide The Elements of Style advised writers to "use the active voice." This made millions of students think passive voice was always wrong — but that's actually a myth we'll clear up in this lesson!

Today

Modern grammar standards, including the Common Core, teach that both voices are useful tools. The goal isn't to avoid one — it's to choose wisely depending on what you want your sentence to say.

So here's the big question this lesson answers: How do you form sentences in active and passive voice, and how do you decide which one to use? By the end, you'll be able to spot each voice, convert between them, and make stronger choices in your own writing.

Section 2

Core Definitions & Principles

Before we dive into examples, let's nail down four key ideas. These are the building blocks you need to understand active and passive voice.

Active Voice

The subject of the sentence performs the action. The doer comes first, the action comes next, and the receiver comes last. Example: "The dog chased the cat."

Passive Voice

The subject of the sentence receives the action. The receiver comes first, then a form of "be" + the past participle. Example: "The cat was chased by the dog."

Past Participle

This is the form of a verb used in passive voice (and in perfect tenses). For regular verbs, it ends in -ed (chased, painted). Irregular verbs have special forms (written, eaten, broken).

"By" Phrase (Agent)

In passive voice, the original doer can appear in a "by ___" phrase at the end. This phrase is optional — you can leave it out entirely. Example: "The cat was chased" (no agent mentioned).

✦

Key Takeaway

Think of a sentence like a news headline about a sports play. In active voice, the headline starts with the player who scored: "Jordan sinks the winning shot." In passive voice, the headline starts with what happened to the ball: "The winning shot was sunk by Jordan." Both describe the same play — they just put a different part of the story in the spotlight.

Section 3

Seeing the Difference: A Visual Guide

The easiest way to understand active versus passive voice is to see how the parts of a sentence rearrange. In the diagram below, notice how the subject, verb, and object shift positions when you switch from active to passive.

Diagram comparing active voice sentence structure with passive voice sentence structure

Notice the key move: in active voice, the chef (the doer) is the subject. In passive voice, the meal (the receiver) takes over as the subject. The verb changes too — it gains a helper word ("was") plus the past participle form of the main verb. The original doer can still appear, but it moves to a "by" phrase at the end — or disappears entirely.

Section 4

How to Form Each Voice

Now let's look at the exact steps for building active and passive sentences. Think of this as a recipe you can follow every time.

Active Voice Formula

Subject (doer) + Verb + Object (receiver)

The subject does the action. The object receives it.

Maria painted the fence.

In this sentence, Maria is doing the painting. She is the subject and the doer. The fence is receiving the action — it's being painted. The verb "painted" is in simple past tense, active voice.

Passive Voice Formula

Subject (receiver) + form of "be" + past participle + (by + agent)

The subject receives the action. The "by" phrase (the original doer) is optional.

The fence was painted by Maria.

Now the fence is the subject, even though it's still the thing being painted. The verb changes to "was" (a form of "be") plus "painted" (the past participle). Maria has moved into a "by" phrase — and you could actually drop that phrase altogether: "The fence was painted."

How "Be" Changes with Tense

The form of "be" in passive voice has to match the tense (time) of the original sentence. Here's how the same sentence looks across different tenses:

Tense	Active Voice	Passive Voice
Simple Present	Maria paints the fence.	The fence is painted by Maria.
Simple Past	Maria painted the fence.	The fence was painted by Maria.
Present Progressive	Maria is painting the fence.	The fence is being painted by Maria.
Future	Maria will paint the fence.	The fence will be painted by Maria.
Present Perfect	Maria has painted the fence.	The fence has been painted by Maria.

See the pattern? The past participle ("painted") stays the same every time. Only the form of "be" changes to match the tense. That's the secret to forming passive voice in any tense.

Section 5

When to Use Each Voice

Here's something important: neither voice is always right or always wrong. Good writers use both. The trick is knowing when each voice works best. Let's look at the situations where each one shines.

Here's a real-world example. Imagine a science lab report. You wouldn't write, "I heated the water to 100°C." Most science writing uses passive voice: "The water was heated to 100°C." Why? Because in science, the procedure matters more than who did it. But if you're writing a narrative essay about your experience, active voice brings the reader closer to you and your actions.

Another common situation: when you don't know who did something. If someone broke a window but nobody knows who, you'd naturally say, "The window was broken" — passive voice, no "by" phrase. That's not lazy writing; it's the right tool for the job.

Section 6

Worked Example: Converting Between Voices

Let's walk through a full conversion from active to passive and back again. Follow each step carefully — this is a skill you'll use on tests and in your own writing.

Converting Active to Passive Voice

1
Starting Sentence (Active Voice)

This is in present perfect tense, active voice. The students are the doers (subject), and the science project is the receiver (object).

The students have completed the science project.
2
Step 1 — Move the Object to Subject Position

Take the receiver ("the science project") and move it to the beginning of the sentence. It becomes the new subject.

The science project ___
3
Step 2 — Change the Verb to "Be" + Past Participle

The original verb is "have completed" (present perfect). To make it passive, we need the same tense of "be" + the past participle. Present perfect of "be" is "has been". The past participle of "complete" is "completed".

The science project has been completed ___
4
Step 3 — Add the "By" Phrase (Optional)

The original doer ("the students") becomes the agent in a "by" phrase. You can include it or leave it out.

The science project has been completed by the students.
5
Step 4 — Check Your Work

Ask yourself: Does the subject receive the action? Yes — the science project is the thing being completed. Is there a form of "be" + past participle? Yes — "has been completed." Does it have the same tense as the original? Yes — both are present perfect. You've successfully converted from active to passive voice!
6
Final Result

Active: The students have completed the science project. Passive: The science project has been completed by the students.

Section 7

Strengths and Limitations

Now that you can form both voices, let's honestly compare them. Remember: this isn't about one being "good" and the other being "bad." It's about understanding what each voice does well and where it falls short.

Feature	Active Voice	Passive Voice
Clarity	Very clear — you always know who's doing what	Can be vague if the "by" phrase is dropped
Sentence Length	Usually shorter (fewer words needed)	Usually longer (adds "be" + sometimes "by" phrase)
Energy & Directness	Feels strong, energetic, action-driven	Feels more formal, calm, or detached
Emphasis	Spotlights the doer of the action	Spotlights the receiver or the action itself
Best For	Narratives, essays, persuasive writing, instructions	Science reports, news, formal writing, when doer is unknown
Common Pitfall	Can feel repetitive if every sentence starts with "I" or "We"	Can sound wordy, vague, or evasive if overused

✦

Key Takeaway

Think of active and passive voice like two camera angles in a movie. Active voice is like a camera pointed at the person throwing the ball — you see who's doing the action. Passive voice is like a camera pointed at the person catching it — you see who's receiving the action. A good director (and a good writer!) uses both angles to tell the best story.

Section 8

Connecting to Bigger Ideas in Writing

Understanding voice is just one piece of a much bigger puzzle in writing. As you keep studying English, you'll discover that sentence structure is full of choices that affect how your reader feels and what they focus on. Here are a few connections to look forward to.

What You're Learning Now	What Comes Next
Active vs. passive voice — choosing who's in the spotlight	Rhetorical strategies — using voice strategically to persuade, inform, or entertain
Forming passive with "be" + past participle	Verb mood — subjunctive, indicative, and imperative moods add even more variety
Recognizing who does the action	Subject-verb agreement in complex sentences — making sure verbs match even when sentences get complicated
Using passive voice intentionally	Author's craft analysis — examining why professional authors choose specific structures

In high school and beyond, you'll analyze published writing and notice how authors mix active and passive voice on purpose. For example, a mystery novelist might use passive voice ("The letter was slipped under the door") to create suspense by hiding the doer. A journalist might use active voice ("The mayor vetoed the bill") to assign clear responsibility. These are all intentional, powerful choices — and you're building the foundation for them right now.

Section 9

Practice Problems

Time to test what you've learned! Try each problem on your own before clicking "Show Answer." The problems get harder as you go — challenge yourself!

Question 1: Problem 1 — Conceptual

What is the main difference between active voice and passive voice? In your own words, explain what changes in the sentence.

Show answer

In active voice, the subject of the sentence is the doer — the one performing the action. In passive voice, the subject is the receiver — the one the action is happening to. When you switch from active to passive, the object moves to the subject position, the verb gains a form of "be" plus the past participle, and the original doer either moves to a "by" phrase or is dropped entirely. Nice work if you mentioned the subject switching roles!

Question 2: Problem 2 — Identification

Identify whether each sentence below is in active or passive voice: a) The homework was finished before dinner. b) Our teacher assigned a new chapter. c) The song has been downloaded millions of times. d) Lightning struck the old oak tree.

Show answer

a) Passive. "The homework" is the receiver (it was finished by someone), and the verb uses "was" + "finished" (form of be + past participle). b) Active. "Our teacher" is the doer performing the action of assigning. c) Passive. "The song" is the receiver (someone downloaded it), and the verb uses "has been" + "downloaded." d) Active. "Lightning" is the doer — it performed the action of striking the tree. Great job if you got all four!

Question 3: Problem 3 — Intermediate Conversion

Rewrite the following active-voice sentence in passive voice. Make sure to keep the same tense. "The rescue team is searching the collapsed building."

Show answer

Passive version: The collapsed building is being searched by the rescue team. Here's why: The original sentence is in present progressive tense ("is searching"). The receiver is "the collapsed building," so it moves to subject position. The passive form of present progressive is "is being" + past participle ("searched"). The doer becomes "by the rescue team." You could also write it without the "by" phrase: "The collapsed building is being searched."

Question 4: Problem 4 — Applied / Multi-Step

Your friend is writing an essay about their school's science fair. They wrote this paragraph entirely in passive voice. Rewrite it using active voice to make it more energetic and direct. "A volcano model was built by our group. The eruption was simulated by mixing baking soda and vinegar. First place was awarded to us by the judges."

Show answer

Active version: "Our group built a volcano model. We simulated the eruption by mixing baking soda and vinegar. The judges awarded us first place." Notice how much more lively and direct the active version sounds! Each sentence now starts with the doer: "our group," "we," and "the judges." The paragraph feels like a real story instead of a formal report. When you're writing about your own experiences, active voice almost always feels more engaging.

Question 5: Problem 5 — Critical Thinking

Read the following two sentences. Both describe the same event. Explain why a writer might choose one version over the other. What effect does each voice create? Version A: "The city council rejected the new park proposal." Version B: "The new park proposal was rejected."

Show answer

Version A (active) puts the spotlight on "the city council" — it makes clear who made the decision. A writer would choose this version if they want to hold the city council responsible or if their article is about the council's actions. Version B (passive) focuses on "the new park proposal" — the thing that got rejected. The doer is completely hidden. A writer might choose this if the article is about the proposal itself (not who voted), or if they want to soften the blow and avoid pointing fingers. Notice how Version B feels more neutral and less accusatory. This is the real power of understanding voice: it's not just grammar — it's a writing strategy that changes what your reader notices and feels. If you explained something along these lines, you're really getting it!

Summary

Lesson Summary

Summary

In this lesson, you learned that every sentence with an action verb can be written in one of two voices. In active voice, the subject performs the action (Subject + Verb + Object), creating sentences that feel direct and energetic. In passive voice, the subject receives the action (Subject + form of "be" + past participle), which shifts the focus to the receiver or hides the doer entirely. The form of "be" changes to match the tense — "is," "was," "has been," "will be," and so on — while the past participle stays the same.

You also learned that neither voice is always better. Active voice is ideal when you want clarity, energy, and accountability. Passive voice works best when the doer is unknown or unimportant, when you want to emphasize the receiver or result, or when a formal tone is appropriate. The strongest writers don't avoid passive voice — they choose deliberately between both voices to shape how their reader experiences every sentence.