Modals (1).

ability (способность, умение) (I can play the piano very well. I could walk when I was one year old.)

obligation (обязанность, должествование) (I must stop eating so much fast food. I have to be at the lesson at 10.30 tomorrow.)

permission (разрешение) Can I stay at Anna's this weekend, Mum? May I speak to you for a moment, Mr Connors? My parents said I could go to the party.

advice (совет) You should tell your teacher about your problems. We ought to call if we're going to be late.

possibility (возможность) In Russia, it can be quite hot in summer. I may be a bit late for Friday's lesson. Peter might have the right answer. There could be some easy questions on the exam.

probability (вероятность) Mr Davies should have the report by now. The exam results ought to be on the website by now.

certainty (уверенность) Your father is late. He must be stuck in traffic. That can't be a postman at the door. He's already been today.

don't change for person or tense. Not: He mights go to the cinema. He might go to the cinema

don't use do in questions. Not: Do you can play the guitar. Can you play the guitar.

are followed by the bare infinitive (without to). Not: I think I will to call John. I think I will call john.

can be made negative using not or -n't. Not: You don't should speak to your mother like that. You shouldn't speak to your mother like that.

don't have an infinitive. You have to use another word or phrase. I hope to be able to attend the meeting. Not: I hope to can attend the meeting.