If we leave at six, we'll ariive on time

If we left at six, we would (we'd) arrive on time

2 If am not busy, I'll come and help you.

If I were not busy, I'd (I would) come and help you

3 If you get the job, you'll earn much money.

If you got the job, you'd (you would) earn much money

4 If you lose your job, you'll find life very difficult.

If you lost the job, you'd find life very difficult