I am by no means absent from this class because I am lazy.
I exercise because I want stay healthy.
I like dogs better than cats, because the former are more faithful than the latter.
I broke down the door because I lost the key.
I went there because I wanted to.
I climb mountains because they are there.
I felt ready to give in because of my miserable failure.
I want to ride a bicycle, because I live far from my school.
I want to rest a little because all the homework is finished.