English grammar practice worksheet for students to revise the use of "have to" in sentences.

Problem Analysis

The task involves two sections:
1. Section A: Choose the correct form of "have to" or "has to" based on the subject of the sentence.
2. Section B: Complete sentences using the appropriate form of "have to," "had to," or "has to."

Solution

#### Section A: Choose the correct word
The rule for choosing between "have to" and "has to" depends on the subject of the sentence:
- Use "has to" when the subject is singular (e.g., he, she, it, a person's name).
- Use "have to" when the subject is plural (e.g., we, they) or second-person singular/plural (you).

Let's solve each sentence:

1. She has to / have to wear glasses because she can't see very well.
- Subject: "She" (singular)
- Correct: has to

2. My uncle is a police officer. He have to / has to wear a uniform.
- Subject: "He" (singular)
- Correct: has to

3. My dad has to / have to wash the car every Saturday.
- Subject: "My dad" (singular)
- Correct: has to

4. We have to / has to cook dinner now.
- Subject: "We" (plural)
- Correct: have to

5. Now they have to / has to go to school.
- Subject: "They" (plural)
- Correct: have to

6. Lily and Danny has to / have to go to work every day.
- Subject: "Lily and Danny" (plural)
- Correct: have to

7. Sarah has to / have to make a phone call now.
- Subject: "Sarah" (singular)
- Correct: has to

8. I have to / has to get up very early every morning.
- Subject: "I" (singular)
- Correct: have to

9. My brother has to / have to go to school on time. His teacher is a strict man.
- Subject: "My brother" (singular)
- Correct: has to

10. I has to / have to go to the dentist because my teeth hurt.
- Subject: "I" (singular)
- Correct: have to

Final Answers for Section A:
1. has to
2. has to
3. has to
4. have to
5. have to
6. have to
7. has to
8. have to
9. has to
10. have to

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#### Section B: Complete the sentences
The choice between "have to," "had to," and "has to" depends on the tense of the sentence:
- Present tense: Use "have to" (plural) or "has to" (singular).
- Past tense: Use "had to."
- Future tense: Use "will have to" (not directly relevant here).

Let's solve each sentence:

1. Yesterday I ………… go home from school early because I was ill.
- Tense: Past tense
- Correct: had to

2. We are going to be late. Sorry, we ………… go now.
- Tense: Present tense (indicating immediate necessity)
- Correct: have to

3. I was at the movie theater early, so I ………… wait.
- Tense: Past tense
- Correct: had to

4. My little sister ………… do homework every day.
- Tense: Present tense (habitual action)
- Correct: has to

5. Leo is at the red light. He ………… stop.
- Tense: Present tense (immediate necessity)
- Correct: has to

6. She ………… go back to the traffic lights five minutes ago.
- Tense: Past tense
- Correct: had to

Final Answers for Section B:
1. had to
2. have to
3. had to
4. has to
5. has to
6. had to

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Final Answer Summary

- Section A: has to, has to, has to, have to, have to, have to, has to, have to, has to, have to
- Section B: had to, have to, had to, has to, has to, had to

Boxed Final Answer:
```boxed{
A: has to, has to, has to, have to, have to, have to, has to, have to, has to, have to
B: had to, have to, had to, has to, has to, had to
}```