Fill in the gaps

Study the example and make interrogative and negative sentences.

I have to wake up early to go to the doctor.

Do I have to wake up early to go to the doctor?

I don't have to wake up early to go to the doctor.

1. The students at our university must do their projects carefully.

   [ ] the students at our university do their projects carefully?

   The students at our university [ ] do their projects carefully.

2. If you have a fever, you should visit a doctor.

   [ ] if I have a fever?

   If you have a fever, you [ ] visit a doctor.

3. She has to go to work today.

   [ ] go to work today?

   She [ ] go to work today.

4. We must wear a helmet when we ride a motorbike.

   [ ] we wear a helmet when we ride a motorbike?

   We [ ] wear a helmet when we ride a motorbike.

5. When Jack was five, he could swim very well.

   [ ] Jack swim when he was five?

   Jack [ ] swim very well when he was five.