1.If your father (to be) here, he (to give) you a piece of his mind
2.I do not know what (to happen) if this (to go) on much longer
.Dont you see that if things like that (to happen) life (to be) quite defferent?
4.I believe you (to make) her stay if it (to be) not so late
5. I (to be) grateful if you (to keep) the news to yourself

1. is // will give 2. Will happen // goes 3. happen // will be 4. will make // is5. I'll be // keep