Adverb clauses provide information about other parts of the sentence. They explain why, when, and under which conditions something happens.

These examples help understand their use:

 why: I quit my job because I didn't like the company.

 when: Apples are picked after they ripen.

 condition: He keeps eating eggs every day even though he knows they're high in cholesterol.

 condition: I will help you if I have time.

Adverb clauses form complex sentences, so you can also reverse the order of the clause--just use a comma (,)

If I have time, I will help you.

After they ripen, apples are picked.

1. She works for a florist because she loves flowers.

3. He usually washes his car if it gets dirty.