Exercise 1: must, mustn’t, have to, don’t have to

 must, mustn’t, have to, don’t have to 1

1Choose the best words and phrases. 

• 1 You mustn'tdon't have to forget to post those letters.

• 2 You don't have tomustn't post those letters. I'll do it later.

• 3 It's a very smart restaurant. I'm afraid you musthave to wear a tie.

• 4 Oh! You musthave to wear a tie. You look good when you wear a tie.

• 5 You have tomust pass your driving test if you want to get a licence.

• 6 You musthave to drive more carefully – you nearly hit that old man.

• 7 The doctor's told me I have tomust drink more water.

• 8 I'm so thirsty - I have tomust have something to drink.