Grammar correction:
A.Verb tenses
1-haven't seen; 2-look; 3-are you going; 4-you're meeting; 5-am going; 6-do you often go; 7-are you going; 8-am meeting, 9-is; 10-have been; 11-are; 12-has just started; 13-is she getting; 14-Does she like; 15-thinks; 16-are you working; 17-spoke; 18-were working; 19-was working; 20-I moved; 21-spoke.


B.If-clauses
1.If Liz didn't go to bed so late, she wouldn't be tired all the time.

2.The dog wouldn't have attacked you if you hadn't provoked it.

3.If I had decided to tell them what has happened, they would have been upset.

4.Martin wouldn't have failed his driving test if he hadn't many so many silly mistakes.