Ответ:

1.I can not  to come tomorrow

2.She had to help him.

3.He could not believe it. 

4.When you are able  translate the text?

5.The match  was to start at 5 p.m.

6.I have to explain everything to him

7.We had to do for ex. 2, p. 142?

8.You don’t have worry