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.

Думаю дальше понятно

1) I don't help my friends to translate sentences from Russian into English.
Do I help my friends to translate sentences from Russian into English?

2) I didn't miss classes yesterday.
Did I miss classes yesterday?

3) We don't want to speak English.
Do we want to speak English?

4) Students don't come to the academy at 8 o'clock.
Do students come to the academy at 8 o'clock?

5) We aren't listening to the tapes twice.
Are we listening to the tapes twice?

6) They won't prepare the task together.
Will they prepare the task together?

7) I haven't just been to this city where I finished school.
Have I just been to this city where I finished school?

8) I haven't invited my friends for the party this week.
Have I invited my friends for the party this week?

9) When I arrived, Kate hadn't been waiting for me.
Had Kate been waiting for me when I arrived?

10) These experiments weren't made by them at the laboratory.
Were these experiments made by them at the laboratory?

11) Houses weren't built last year.
Were houses built last year?

12) I haven't already seen her and spoken to her.
Have I already seen her and spoken to her?

13) Her report hadn't already been done when he entered the conference hall.
Had her report already been done when he entered the conference hall?

14) We haven't been discussing this problem since morning.
Have we been discussing this problem since morning?

15) I am not present at the lectures at the academy.
Am I present at the lectures at the academy?