Поставьте предложения в отрицательную форму. 1 She can speak English fluently.2.You should tell him about it now.3.The students who failed exams must do that again.4.He may smoke in this room.5.I can see him tomorrow morning.6.They should be back before eleven. 7 She has to write letters every month. 8 The train is to arrive at 8 o’clock. 9 We had to do much work.