過去完成式是不能單獨用的.我們用的時候必須有另一個事件.比如說,有兩件事:A和B,兩件事都發(fā)生在過去,但A發(fā)生在B之前,那麼A用去完成式,B則要用過去式,如:
He had worked before he decided to go to college.他念大學以前曾工作過.
你的句子:He said " I visited the Great Wall in 2001." 是表示過去某個時間做過的事,是要
用一般過去式的.(這是一個直接陳述句,若是間接轉(zhuǎn)述句,就會用到過去完成式了,因為他去參觀長城是在他說話之前發(fā)生的動作,句子是:He said that he had visited the Great Wall before.)
清楚了嗎?那改為間接引于是He said that he had visited the Great Wall in 2001. 還是He said that hevisited the Great Wall in 2001後者