如果用了after, before 這樣明確表示時間的連詞,說明動作之間緊密相連,一件接著一件；或者說,在同一時間里,連續(xù)做的幾件事.因此,一般不用過去完成時.例如：

After I had done my work, I played tennis.
I saw your father before I went.
I reached the station, the bell rang and the train started.