1. Do it now, or you will not finish it on time.

.......IF YOU DON'T DO IT NOW,YOU WON'T FINISH IT ON TIME............................................................................

2. He doesn't apply for the job because he doen't have anough qualifications.

..........IF HE HAD ENOUGH QUALIFICATIONS,HE WOULD APPLY FOR THE JOB..........................................................................

3. She can't come, he's disappointed.

........IF SHE CAME,HE WOULDN'T BE DISAPPOINTED............................................................................

4. Hurry up, or we will be late for the exam.

........IF YOU DON'T HURRY UP,WE WILL BE LATE FOR THE EXAM.............................................................................

5. They do not understand you because you don't ofen talk to them.

.............IF YOU TALKED TO THEM ,THEY WOULD UNDERSTAND YOU........................................................................