Modals of obligation

Match the correct explanation (a or b) to each sentence (1-6)

1 I must eat less.                       [The doctor told me, I want to lose weight]

2 I have to eat more fruit.                       [The doctor told me, I want to lose weight]

3 I must make this Italian dish I've seen on TV.                           [I'm afraid I can't go out, It will be really nice]

4 I have to make dinner tonight.                           [I'm afraid I can't go out, It will be really nice]

5 Oh, dear! I must go on a diet.                                       [I want to look good, It's one of the condition, I'm afraid]

6 I have to go on a diet if I want to be a model.                                       [I want to look good, It's one of the condition, I'm afraid]

Complete the sentences with must / mustn't, have to / don't have to

1 You      do your homework as soon as you leave school. I don't want you to be lazy.

2 Children         say rude words.

3 It's Saturday today. I                go to work.

4 Stuudents         cheat in exams.

5 Children         play with other children to socialize.

6 If you have rich parents, you               work at all.

7 My mother always tells me that I      clean my own shoes, but I forget.

8 I               work very hard at school. The lessons are very easy.

Transform the following sentences using modals.

1 It isn't necessary for us to finish the project until next week.

                         the project unil next week.

2 Stop making so much noise. I'm trying to listen to news.

               making so much noise.

3 Chewing gum is not allowed in the classroom.                   the gum in the classroom.

4 It's necessary for Mary to take her dog out three times a day.                          out three times a day.

5 It isn't necessary for you too give me an answer right now.                        an answer right now.

6 Students aren't allowed to use their dictionaries during the exam.                       their dictionaries during the exam.