Описание презентации по отдельным слайдам:
Obligation/Necessity must - strong obligation to do sth., the speaker himself has decided that sth is necessity I must contact the school for some information. have to – strong necessity/obligation, when objective circumstances make us do sth We have to wear uniform at school. had to – past form of must and have to should/ought to – duty or weak obligation We should clear away the mess in the kitchen.
Absence of necessity don’t have to-don’t need to-needn’t - sth which isn’t necessary to do in the present/future You don’t have to dress formally today. needn’t have V3 – sth which wasn’t necessary to do in the past but it was done You needn’t have cooked so much food. We weren’t hungry. didn’t have to – sth which wasn’t necessary to do. We don’t know if it was done or not. He didn’t have to invite everyone to the party. (We don’t know if he invited everyone.)
Possibility can + present infinitive - general/theoretical possibility Going to the gym can be boring. could/may/might + present infinitive - possibility in a specific situation. She should take a map with her. She might get lost. We can use can/could/might in questions, but NOT may. How difficult can it be? could/might/would + perfect infinitive sth in the past that was possible but didn’t happen He could have come with us, if he hadn’t missed the train.
Ability/Inability can - ability in the present/future. I can speak Italian fluently. could – general or repeated ability in the past I could sing quite well when I was younger. was(n’t) able to – (in)ability on a specific occasion in the past I was able to (wasn’t able to) find all the answers. couldn’t – any kind of inability in the past I couldn’t read or write when I was four.
Logical Assumptions/Deductions must = almost certain that it is/was true He isn’t at work. So he must be on his way home. may/might/could = possible that it is/was true The computer is out of order. It may be broken. can’t/couldn’t = almost certain that it is/was impossible That can’t be John! John has blue eyes and blond hair.
Номер материала: ДВ-052878
Вам будут интересны эти курсы:
|Включите уведомления прямо сейчас и мы сразу сообщим Вам о важных новостях. Не волнуйтесь, мы будем отправлять только самое главное.|