a) If you like, I can/may make an appointment for you to see Dr. Krall tomorrow.
b) Passengers mustnt/dont have to smoke while on board the plane.
c) Dont let Sylvie climb that tree. She can/might fall.
d) You probably shouldnt/mustnt keep your passport in that pocket: it should/could easily be stolen.
e) Im afraid Karen cant/couldnt come to the party tomorrow because shes got flu.
f) Oh no! It mustnt/cant be seven oclock already! Jill and Graham will be here in fifteen minutes!
g) I absolutely ought to/have to leave the house at six if I want to be at the station by six-thirty.
h) Be careful, that pots very heavy. You have to/could hurt your back.
Find the mistakes and underline them. Then write the correct sentences.
1. I cant to come to your Christmas party next week. I cant come
2. Do you can ride a bicycle?
3. They say she cans run very fast.
4. Could they to go to the air show tomorrow?
5. We cant visit the folk dance festival yesterday.
6. He didnt can get to the school ball last Saturday.
Rewrite the sentences with perhaps or maybe, without changing the meaning.
1. I may play football next Saturday. (perhaps)
Perhaps I will play football next Saturday.
2. He might come with us to the New Years Dance. (maybe)
3. Chelsea might win the Champion League. (perhaps)
4. They may invite us to their engagement party. (maybe)
5. She might go to the Easter Races without you. (perhaps)
6. We may put up the Christmas decorations tonight. (maybe)
19. Write the rules by completing them with you must (+) or you must not (-)
1. drive on the left in Britain. (+) You must drive on the left in Britain.
2. cross the road at the zebra crossing (+)
3. walk on the grass (-)
4. smoke inside the restaurant (-)
5. wear a seat belt when you drive (+)
6. go out without your identity card (-)
Tick the correct sentences.
1. a)(˅) Notice: Deep water. You must not swim here.
b)() Notice: Deep water. You dont have to swim here.
2. a)() Mother: You mustnt get up early tomorrow. There is no school.
b)() Mother: You dont have to get up early tomorrow. There is no school.
3. a)() Teacher: You mustnt run in the corridors. Its dangerous.
b)() Teacher: You dont have to run in the corridors. Its dangerous.
4. a)() Policeman: You mustnt drive so fast. Its 50-km-per-hour zone.
b)() Policeman: You dont have to drive so fast. Its 50-km-per-hour zone.
5. a)() Classmate: You mustnt give in your essay until Friday. Theres lots of time.
b)() Classmate: You dont have to give in your essay until Friday. Theres lots of time.
6. a)() Judge: Im banning you from driving for 12 months. You mustnt drink and drive again.
b)() Judge: Im banning you from driving for 12 months. You dont have to drink and drive again.
