以我在幫你回答問題為例：
一般現(xiàn)在時(shí)、I help you answer the question.
現(xiàn)在進(jìn)行時(shí)、I am helping you answer the question now.
一般將來時(shí)、I will help you answer the question tomorrow.
現(xiàn)在完成時(shí)、I have helped you answer the question.
一般過去時(shí)、I helped you answer the question.
過去進(jìn)行時(shí)、I was helping you answer the questionat that time.
過去將來時(shí)、I was about to help you answer the question.
過去完成時(shí)(又名過去過去時(shí))、I had helped you answer the question.