We are changing a statement to a question. Questions start with question words and end with (?). Choice B moves 'Is' to the front and adds a question mark.

We are finding the question sentence. Questions ask something and use question marks. 'Do we play outside?' asks a question with the right mark.

We're turning a statement into a question. 'Does the turtle move slowly?' is right because we add 'Does' and keep 'move' without the 's'. The verb doesn't need 's' after 'Does.'

This tests making questions. To make a question, put 'Is' at the start. Choice A says 'Is the cat cozy?' which asks about the cat.

This question tests 1st grade sentence writing and structure (CCSS.L.1.1.j: Produce and expand complete simple and compound declarative, interrogative, imperative, and exclamatory sentences). Complete sentences must have a subject (who or what) and a predicate (what they do or are). There are four types of sentences: Statements/Declarative tell something and end with a period (The cat runs.). Questions/Interrogative ask something and end with a question mark (Where is the cat?). Commands/Imperative tell someone to do something and end with a period (Close the door.). Exclamations/Exclamatory show strong feelings and end with an exclamation mark (What a big cat!). The basic sentence can be expanded by adding where the action happens. Choice B is correct because it adds detail (where - on the cozy rug) that makes sense and is grammatically correct. Choice C represents a fragment error by missing the subject. Students make this error because they forget that sentences need both who and what doing. To help students: For expansion, use question prompts: The bird sings (When? Where? How? What kind of bird?). Practice transformations: write statement, turn it into question, turn it into command.

This question tests 1st grade sentence writing and structure (CCSS.L.1.1.j: Produce and expand complete simple and compound declarative, interrogative, imperative, and exclamatory sentences). Complete sentences must have a subject (who or what) and a predicate (what they do or are). There are four types of sentences: Statements/Declarative tell something and end with a period (The cat runs.). Questions/Interrogative ask something and end with a question mark (Where is the cat?). Commands/Imperative tell someone to do something and end with a period (Close the door.). Exclamations/Exclamatory show strong feelings and end with an exclamation mark (What a big cat!). The sentence needs a predicate to be complete after the subject 'Chen'. Choice B is correct because it adds a predicate ('reads a book') with proper lowercase start, making 'Chen reads a book.' a complete declarative sentence. Choice A represents a fragment ('at the library.' is a prepositional phrase, not a predicate). Students make this error because they forget sentences need both subject and predicate, confusing phrases with full verbs. Use 'who/what + does what' check for completeness. Practice building with subject and predicate cards. Watch for fragments and capitalization errors like unnecessary capitals.

This question tests 1st grade sentence writing and structure (CCSS.L.1.1.j: Produce and expand complete simple and compound declarative, interrogative, imperative, and exclamatory sentences). Complete sentences must have a subject (who or what) and a predicate (what they do or are). There are four types of sentences: Statements/Declarative tell something and end with a period (The cat runs.). Questions/Interrogative ask something and end with a question mark (Where is the cat?). Commands/Imperative tell someone to do something and end with a period (Close the door.). Exclamations/Exclamatory show strong feelings and end with an exclamation mark (What a big cat!). The basic sentence 'The bird sings.' can be expanded by adding when, where, how, or describing words. Choice A is correct because it adds detail ('in the morning') that tells when, making the sentence more interesting and grammatically correct while keeping it a statement. Choice B represents a fragment by removing the article ('Bird sings.' misses 'The' and is incomplete). Students make this error because they don't know how to expand without removing key parts like articles or changing the type. For expansion, use question prompts: The bird sings (When? Where? How? What kind of bird?). Practice with sentence strips to add detail cards. Watch for fragments when expanding and ensure additions make sense.

This question tests 1st grade sentence writing and structure (CCSS.L.1.1.j: Produce and expand complete simple and compound declarative, interrogative, imperative, and exclamatory sentences). Complete sentences must have a subject (who or what) and a predicate (what they do or are). There are four types of sentences: Statements/Declarative tell something and end with a period (The cat runs.). Questions/Interrogative ask something and end with a question mark (Where is the cat?). Commands/Imperative tell someone to do something and end with a period (Close the door.). Exclamations/Exclamatory show strong feelings and end with an exclamation mark (What a big cat!). The sentence asks something and ends with a question mark (?). Choice C is correct because it asks something ('Where is my lunch?'), starts with a question word ('Where'), and ends with the right punctuation (?). Choice A represents a statement with wrong punctuation for a question ('We read at school.' ends with . instead of ?). Students make this error because they confuse punctuation marks (? vs . vs !) and forget that questions must end with a question mark to show they are asking. To help students: Teach sentence types with actions - shrug shoulders and make ? shape for questions. Practice transformations: write a statement, turn it into a question by changing word order and adding ?. Watch for wrong punctuation (period for question) and confusion about sentence types.

This question tests 1st grade sentence writing and structure (CCSS.L.1.1.j: Produce and expand complete simple and compound declarative, interrogative, imperative, and exclamatory sentences). Complete sentences must have a subject (who or what) and a predicate (what they do or are). There are four types of sentences: Statements/Declarative tell something and end with a period (The cat runs.). Questions/Interrogative ask something and end with a question mark (Where is the cat?). Commands/Imperative tell someone to do something and end with a period (Close the door.). Exclamations/Exclamatory show strong feelings and end with an exclamation mark (What a big cat!). The basic sentence 'We play outside.' can be expanded by adding when, where, how, or more details. Choice C is correct because it adds 'after school' to tell when, making it more detailed and grammatically correct while staying a statement. Choice D represents less information by removing 'outside,' making it shorter instead of expanded. Students make this error because they confuse expansion with simplification or shortening. Use prompts like 'When? Where? How?' for expansion. Practice adding detail words. Watch for removing info instead of adding and ensure grammatical sense.

We're finding the question sentence. Questions ask something and end with a question mark (?). 'Where is my lunchbox?' asks where something is and has the right mark at the end.