Grammar exercise worksheet for identifying and correcting mistakes in sentences.

Task: Find the mistake in each sentence and correct it.

Let's go through each sentence one by one, identify the mistake, and provide the corrected version.

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#### 1. I seen a movie last night.
- Mistake: The verb "seen" is incorrect. The past tense of "see" is "saw."
- Corrected Sentence:
I saw a movie last night.

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#### 2. He don't like pizza.
- Mistake: The contraction "don't" is used with plural subjects or second-person singular ("you"). For third-person singular ("he"), the correct form is "doesn't."
- Corrected Sentence:
He doesn't like pizza.

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#### 3. Their going to the store.
- Mistake: "Their" is a possessive pronoun, but the sentence requires the subject pronoun "they." Additionally, the verb "going" should be conjugated as "are going."
- Corrected Sentence:
They are going to the store.

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#### 4. Me and my friend played video games all day.
- Mistake: "Me" is an object pronoun and cannot be used as the subject of the sentence. The correct subject pronoun is "I."
- Corrected Sentence:
My friend and I played video games all day.

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#### 5. The dog chased it's tail.
- Mistake: The possessive pronoun "it's" is incorrect here. The apostrophe form "it's" is a contraction of "it is." The possessive form for "its" (no apostrophe) is needed.
- Corrected Sentence:
The dog chased its tail.

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#### 6. She have a lot of homework.
- Mistake: The verb "have" is incorrect with the third-person singular subject "she." The correct form is "has."
- Corrected Sentence:
She has a lot of homework.

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#### 7. We was watching TV when the power went out.
- Mistake: The verb "was" is incorrect with the plural subject "we." The correct form is "were."
- Corrected Sentence:
We were watching TV when the power went out.

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#### 8. The book layed on the table all weekend.
- Mistake: The verb "layed" is incorrect. The past tense of "lie" (to rest) is "lay."
- Corrected Sentence:
The book lay on the table all weekend.

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#### 9. The team is comprised of ten players.
- Mistake: The phrase "is comprised of" is grammatically incorrect. The correct form is "is composed of" or "comprises."
- Corrected Sentence:
The team is composed of ten players.
*Alternatively:*
The team comprises ten players.

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#### 10. The cat chased the mouses.
- Mistake: The plural form of "mouse" is "mice," not "mouses."
- Corrected Sentence:
The cat chased the mice.

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#### 11. She want to spend time with me.
- Mistake: The verb "want" is incorrect with the third-person singular subject "she." The correct form is "wants."
- Corrected Sentence:
She wants to spend time with me.

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#### 12. She don't know how to swim.
- Mistake: Similar to sentence 2, the contraction "don't" is incorrect with the third-person singular subject "she." The correct form is "doesn't."
- Corrected Sentence:
She doesn't know how to swim.

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#### 13. They was playing basketball in the park.
- Mistake: The verb "was" is incorrect with the plural subject "they." The correct form is "were."
- Corrected Sentence:
They were playing basketball in the park.

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#### 14. The teacher give us a lot of homework.
- Mistake: The verb "give" is incorrect with the third-person singular subject "teacher." The correct form is "gives."
- Corrected Sentence:
The teacher gives us a lot of homework.

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#### 15. My dad drove me to school today.
- Mistake: This sentence is grammatically correct. No correction needed.
- Corrected Sentence:
My dad drove me to school today.

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#### 16. The boys' team won their game.
- Mistake: This sentence is grammatically correct. No correction needed.
- Corrected Sentence:
The boys' team won their game.

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#### 17. Me and my sister saw a shooting star last night.
- Mistake: Similar to sentence 4, "me" is an object pronoun and cannot be used as the subject of the sentence. The correct subject pronoun is "I."
- Corrected Sentence:
My sister and I saw a shooting star last night.

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#### 18. The child's toys was laying all over the floor.
- Mistake: There are two issues here:
1. The verb "was" is incorrect with the plural subject "toys." The correct form is "were."
2. The verb "laying" is incorrect. The correct past participle form of "lie" (to rest) is "lying."
- Corrected Sentence:
The child's toys were lying all over the floor.

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#### 19. The bird's nest is on it's branch.
- Mistake: The possessive pronoun "it's" is incorrect. The apostrophe form "it's" is a contraction of "it is." The possessive form for "its" (no apostrophe) is needed.
- Corrected Sentence:
The bird's nest is on its branch.

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#### 20. We could of gone to the park if it wasn't raining.
- Mistake: The phrase "could of" is incorrect. The correct form is "could have."
- Corrected Sentence:
We could have gone to the park if it wasn't raining.

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Final Corrected Sentences:

1. I saw a movie last night.
2. He doesn't like pizza.
3. They are going to the store.
4. My friend and I played video games all day.
5. The dog chased its tail.
6. She has a lot of homework.
7. We were watching TV when the power went out.
8. The book lay on the table all weekend.
9. The team is composed of ten players.
*Alternatively:* The team comprises ten players.
10. The cat chased the mice.
11. She wants to spend time with me.
12. She doesn't know how to swim.
13. They were playing basketball in the park.
14. The teacher gives us a lot of homework.
15. My dad drove me to school today.
16. The boys' team won their game.
17. My sister and I saw a shooting star last night.
18. The child's toys were lying all over the floor.
19. The bird's nest is on its branch.
20. We could have gone to the park if it wasn't raining.

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Final Answer:

\boxed{
\text{See the corrected sentences above.}
}