номер 9, страница 91 - гдз по английскому языку 7 класс учебник Дули, Оби

• Modals (must/have to/need to/might)

9. 7.6.13.1 Read the theory. Are there similar structures in your language?

Find examples in the text on p. 88.

Modal verbs:

• do not take -s, -ing or -ed suffixes.

• are followed by the bare infinitive.

• come before the subject in questions and are followed by not in the negative. Should I work out more often? No, you shouldn't.

We use must/mustn't to:

• express subjective obligation and duty: You must listen to your doctor. (You are obliged to. It's your duty.)

• express very strong advice: You must change your diet. (I strongly advise you to ....)

• express prohibition: You mustn't run on the grass. (It is against the rules/law.)

We use have to/don't have to to:

• express objective obligation: Alina has to wear a uniform at work. (She is obliged to; it's the rule)

• express necessity: Kate broke her arm and has to go to the hospital. (It's necessary.)

We use need to/don't need to to express necessity. I need to exercise more. (I think it is necessary. It is a good idea).

We use might for possibility in the present or the future: You might enjoy ice skating. (It is possible.)