Ответ:

1. If John doesn't do his homework, his teacher will be angry.

2. You won't pass your exams if you don't study.

3. We will go to the concert if we can get tickets

4. If there is a good time on TV, Lyn will watch it.

5. Becky will be cold if she doesn't wear her coat.

6.Sally will be unhappy if she misses the party.