Ваш друг говорит, что он может (должен) сделать что-либо, но вы знаете, что он мог (должен был) сделать это ранее. скажите ему об этом. 1. i can play piano well. 2.i cant speak english at all. 3. i must buy tickets for you and me. 4. i must give up smoking. 5.i can go shopping to-day. 6. i mustnt say such things now.

1. I can play the piano well. - You could have played the piano well. 2. I can't speak English at all. - You could have learnt English. 3. I must buy tickets for you and me. - You should have bought them yesterday. 4. I must give up smoking. - You should have given it up long ago. 5. I can go shopping today. - You could have done it yesterday. 6. I mustn't say such things now. - You shouldn't have said such things then.