Complete the sentences, using must not / mustn't or do not / don't have to

We ... leave the windows open or the rain will come in

перевести текст. - What must I do now? Am I ready, Mum? - No, you are not. Not yet. Now you must go through security control. - Must I show them my passport? - No, you need not there, but you must show it to them at passport control.

Underline the correct modal verbs: 1) Scientists don't have to/must consider the dangers of cloning. 2) People mustn't/don't have to be experts to operate a DVD player. 3) You must/mustn't switch off your computer when it is not in use.

Example: You must / don't have to tidy your room. It's a mess. 1 You don't have to / mustn't swim there. It's dangerous. 2 I haven't to / don't have to do my homework. It's Saturday. 3 She must / mustn't practise the piano tonight.

Use the words in brackets to complete the sentences 1) Granny ... (think) it ... (rain) tomorrow 2) It ... (not/rain) in August in this part of the country. 3) It ... (not/rain) yesterday. 4) If it ... (rain), we ... (play) chess. 5) Nobody ...

Circle the correct words 1. You can go out tonight, but you mustn't/don't have to come home later than I am. 2. Great! I'm under 12! I mustn't/don't have to pay. 3. Great! No school today - I don't have to/mustn't get up early 4.