Join each pair of independent clauses with a coordinating conjunction to make one compound sentence. Remember to add a comma before the coordinating conjunction.

David is constantly tired in class. He should sleep more each night.
We have permission to spend the money. What shall we buy?
They are going to lunch at two o'clock. We will be playing football then.
Kerry is a very honest person. You can trust him.

David is constantly tired in class, so he should sleep more each night.

We have permission to spend the money, so what shall we buy?
They are going to lunch at two o'clock, and we will be playing football then.
Kerry is a very honest person, so you can trust him.