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.