1. You _______ wear a helmet on the building site.

2. The students _____ go to school on Sunday.

3. The deadline of my project is Tuesday. I _______ finish it on Tuesday.

4. I _____ finish this exercise, otherwise my mum will punish me.

5. John _______ be at work at ten. It is the time when his work starts.

1. You must wear a helmet on the building site.

2. The students don’t have to go to school on Sunday.

3. The deadline of my project is Tuesday. I have to finish it on Tuesday.

4. I must finish this exercise, otherwise my mum will punish me.

5. John has to be at work at ten. It is the time when his work starts.

Обяснение:

• Must – изразява силно задължение или необходимост, често наложени от говорещия или произтичащи от правилата.

• Don’t have to – означава, че няма задължение да се направи нещо; действието не е задължително.

• Have to – изразява задължение, продиктувано от външни обстоятелства, правила или срокове.

• Has to – използва се вместо have to в трето лице, единствено число (he, she, it, John).

Следователно правилните отговори са: must, don’t have to, have to, must, has to.