Відповіді: Стр.38 (1)

1. Read the examples. Then complete the rules with the verbs in the examples.

a) should and ought to say that something is a good idea.

b) shouldn't says that something is a bad idea.

c) have to says that something is necessary.

d) don't have to says that something is not necessary.

e) mustn't says it is very important not to do something.