1.“By the end of +名词(短语)，主语 + had done…”
例如：By the end of the day, most of the inhabitants had left their
2.“主句(had done), before + 过去时间状语 ”
例如：They had never seen so many of the locusts before.(他们以前从未见过如此多的蝗虫)
I had reached the station before six o'clock.
3. “用在told, said, knew, heard, thought等动词后的宾语从句，表示动作发生在这些动词之前。”
例如：She said that she had never been to Paris.(她说她从未去过巴黎。)
4.“By the time + 从句(did/was/were), 主语 + had done…”
例如：By the time we arrived, everyone had received medical
5.“主语 +had done…, before 从句(did/was/were)”
例如：Fortunately, the population had left the village before the volcano
6.“主语 +had done…, when 从句(did/was/were)”
例如：They had already put the fire out when I returned to the
7.“主语 + (did/was/were), after 从句(had done)”
例如：The earthquake happened in the daytime after people had already left
home for work or school.(地震发生在白天，当时人们已离开家去上班或上学。)
8.“用在 Hardly(scarcely, barely)…when…, No sooner…than…句型中”
例如：Hardly had I got home when the rain poured down. (我刚到家大雨就倾盆而下。)
No sooner had he left home than it began to rain. (他一离开家天就下起雨来。)
9.“用在 It /This/That was the first…time + that 从句 (had done)中”
例如：It was the third time that he had made the same mistake.
10.“用在It was/had been + 一段时间 + since 从句 (had done)中”
例如：It was ten years since we had had such a wonderful
11.“hope, plan, mean, expect, intend, suppose, want, think
例如：They had wanted to help but could not get here in time.
I had thought that he had died at least twenty years ago.
I had intended to come over to see you, but was prevented from doing so.
例如：If she had seen you yesterday, she would have told you the truth.
13.“用在 wish 后的宾语从句中，表示与过去事实相反。”
例如：I wished that he hadn't made such a mistake. (我希望他从未犯过这样的错误。)
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