过去完成时常用时间状语
By then by that time until by the end ofbefore 2000by the time no soonor…than或者hardly…when..一就
It was the first time that I had passed the exam.
He said that he had learned 3000 English words.
If he had studied hard last term, he would have passed the exam.
He wishes that he had focused on study in his teens.
He had hoped to go home but an old friend of his came.
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