переделать в другие времена (прошедшее,настоящее,будущее)
1)my friend entered the medical institute last year 2)al students take exams in winter 3)the delegation will leave Tomsk on Monday 4)do you receive letters from your friends? 5)the students of our group attend all the lectures 6)some students failed their entrance exams 7)the lecture will last two hours 8)shall we go to the disco in the evening? 9)he was good at mathematics,but the failed in physics

1) My
friend entered the medical institute last year. My friend enters the medical
institute. My friend will enter the medical institute next year.

2) All
students take exams in winter. All students took exams in winter. All students will
take exams in winter.

3) The
delegation will leave Tomsk on Monday. The delegation leaves Tomsk on Monday. The
delegation left Tomsk on Monday.

4) Do you
receive letters from your friends? Did you receive letters from your friends?
Will you receive letters from your friends?

5) The
students of our group attend all the lectures. The students of our group attended
all the lectures. The students of our group will attend all the lectures.

6) Some
students failed their entrance exams. Some students fail their entrance exams. Some
students will fail their entrance exams.

7) The
lecture will last two hours. The lecture lasts two hours. The lecture lasted
two hours.

8) Shall we
go to the disco in the evening?  Do you
go to the disco in the evening?  Did you
go to the disco in the evening? 

9) He was
good at mathematics, but he failed in physics. He is good at mathematics, but he
fails in physics. He will be good at mathematics, but he will fail in physics.