I. 1. If I fail the exam, I will take it again.
2. If you see Jane, will you give her my message?
3. increase, will die
4. won't tell, don't come
5. snow
II. 1. were not cooking
2. was not reading
3. wasn't having a shower
4. was not sleeping
5. were not eating
III. 1. doesn't drink
2. doesn't sleep now, is working
3. Will you go\ Are you going (if it's an arrangement)
4. I have known
5. played