Подчеркни правильное слово 1. dogs can/can't run fast. 2. crocodiles can/can't swim. 3. we must/mustn't look after our pets. 4. children must/ mustn't do their homework every day. 5. if you have a pet at home you must/mustn't feed them.

1. can
2. can
3. must
4. must
5. must 

Since when has he learnt Chinese? - Since he got to university We have been building this garage ourselves and hope to finish it within the next two mouths We haven't finished Cleaning the machines yet. Oh, You have had a shave! You look strange without a beard. I have been borrowing books from this libraly since we moved here she has been talking on the phone for half an hour now . Who is she talking to? He has collected stamps ever since he was a small boy I study hard of late. Ive got exams next week I have learnt Spanish since last year You look tired- Yes, I have been working non-stop all day

Present Simple:
1. She goes to Mike every day.
2. Tourists in London want to see Big Ben.
3. He usually gets up at 7o'clock.
Present Continuous:
1. She is playing tennis now.
2. It is raining outside.
3. They are playing computer games now.
Present Perfect:
1. I have been to America.
2. They have already finished.
3. He has been late again.
Present Perfect Continuous:
1. He has been reading the book for three hours.
2. I have been waiting for him for several hours.
3. She has been working on the project since morning.