1.

1-e

2-a

3-f

4-b

5-d

6-c

2.

1.knew

2.had

3.had

4.went

5.wouldn't be

6.wouldn't use

7.would have

8.wouldn't be

3.

2.if I didn't go to bed late, I wouldn't be tired in the morning.

3.if I liked football, i would watch.....

4.if it wasn't warm outside, I would take....

5.if she had got her address book with her, she would send some postcards.

6.if I understood this ex.,I could do it.