6 ** Replace the words in bold with phrases using must/mustn't or have to/don't
have to, as in the example.

2. It's prohibited to speak on your mobile phone in here.
3. It isn't necessary for you to send the email. I've already done it.
4. You are obliged to pay to download music and films on some sites.
5. It's prohibited to bring mobile phones into the exam room,
6. It's not necessary to buy a tablet, you can use mine.
7. It's necessary for me to study harder.
8. John and Bill are obliged to finish their work before they can go home.​



Odpowiedź :

You musn't speak on your mobile phone in here.

You don't have to send the email. I've already done it.

You have to pay to download music and films on some sites.

You musn't bring mobile phones into the exam room.

You don't have to buy a tablet, you can use mine.

I have to study harder

John and Bill have to finish their work before they can go home.