If Susan (pass) his exam.
Parents (buy) her a New Mobile.
Mary (be) late for classes.
If Jim (learn) to be polite.

1) if Susan passes his exam parents will buy her a New mobile

2) Mary will be late for classes ( или Mary is late for classes) - контекст не понятен, поэтому и время непонятно какое ставить

3) If Jim learns to be polite