The kids played a game, but they had to stop because of the rain.
compound
Ms. Romero gave three classes.
simple
Maria has to study, and George has to help maria by being quiet.
compound
Tomorrow I have a quiz on spelling and on science.
simple
My car is broken, but Dad will buy me a new toy.
compound
The Dog chased the cat, and the cat went up the tree.
compound
Mike got a new toy train.
simple
The Dog was sad, and mom gave him a bone.
compound