Сделайте предложения отрицательными и вопросительными: 1) 1 help my friends to translate sentences from Russian into English. 2) I missed classes yesterday. 3) We want to speak English. 4) Students come to the Academy at 8 o’clock. 5) We are listening to the tapes twice. 6) They will prepare the task together. 7) I have just been to this city where 1 finished school 8) I have invited my friends for the party this week. 9) When I arrived Kate had been waiting for me 10) These experiments were made by them at the laboratory. 11) houses were built last year 12) 1 have already seen her and spoken to her. 13) Her report had been already done when he entered the conference hall 14)We have been discussing this problem since morning 15) I am present at the lectures at the Academy.