Although he was tired, he finished his work.
· If you study hard, you will succeed.
· Before you leave, call me.
· After he finished his work, he rested.
· Until she arrived, we waited.
· She looked as though she had seen a ghost.
· I will call you if I have time.
· I was sleeping when he called me.
· He worked until midnight.
· As I was late, I took a taxi.
· I took a taxi as I was late.