1） 概念：表示过去的过去----|-------|-----|---->其构成是had +过去分词构成。那时以前 那时 现在 2） 用法a. 在told, said, knew, heard, thought等动词后的宾语从句。She said (that) she had never been to Paris.b. 状语从句在过去不同时间发生的两个动作中，发生在先，用过去完成时；发生在后，用一般过去时。c. 表示意向的动词，如hope, wish, expect, think, intend, mean, suppose等，用过去完成时表示'原本…，未能…'We had hoped that you would come, but you didn't.3) 过去完成时的时间状语before, by, until , when, after, once, as soon as。He said that he had learned some English before.By the time he was twelve, Edison had began to make a living by himself.Tom was disappointed that most of the guests had left when he arrived at the party.
在“one of +名词（复数）+关系从句”中的单复数在“one of+名词（复数）+关系从句”中，关系从句中的谓语动词常采用复数形式。【例如】She is one of the students who have passed Band Six.one之前有the only等修饰语时从句动词要用单数。【例如】She is the only one of the girls who is chosen as the member of student union.He was the only one of the boys who was given a prize.</p 产品：澳博培训供货总量：不限产品价格：议定包装规格：不限物流说明：货运及物流交货说明：按订单
