If I get home late my father will be angry.
He won't go to the party if she doesn't go.
If the parcel arrives while you're out I will sign for it.
If they don't leave now they won't catch the plane.
I will write to you at the weekend if I have time.
If you take the CD back to the shop they will exchange it for another.
We won't want dinner if we have a meal on the plane.
If you come round tommorow evening I will introduce you to my American cousins.
You won't do well in the test if you don't learn your vocabulary.
