Changing Compound Sentences to Complex and Simple ones
Compound: He was poor, but he was honest.
Complex: Though he was poor, he was honest.
Simple: In spite of his poverty, he was honest.
Compound: Go there, or you will be fined.
Complex: Unless you go there (or, If you do not go there) you will be fined.
Simple: You must go there to escape being fined (or, to escape a fine)
Compound: Speak the truth, and I shall pardon you.
Complex: If you speak the truth I shall pardon you.
Simple: In the event of your speaking the truth, I shall pardon you.
Compound: He was ill; therefore. he could not come.
Complex: He could not come because he was ill.
Simple: He could not come because of (or, on account of) his illness.
Compound: I called him. but he did not answer.
Complex: Though (or, When) I called him. he did not answer.
Simple: He did not answer to my call.
Compound: He not only made a promise but kept it. .
Complex: He kept the promise he had made.
He kept his promise.
Compound: I did this and so offended him.
Complex: I offended him because I did this.
I offended him by doing this.
Compound: He must return the goods or pay the bill.
Complex: If he does not return the goods, he must pay the bill.
Simple: In case of his failure to return the goods, he must pay the bill.
Compound: He wanted to see you, and so he came home.
Complex: He came home in order that he might see you.
Simple: He came home to see you.