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...
1) 事实状态的动词 have, belong, possess, cost, owe, exist, include, contain, matter, weigh, measure, continue I have two brothers. This house belongs to my sister. 2) 心理状态的动词 Know, realize, think see, believe, suppose,...
时间状语从句,条件句中,从句用一般现在时代替将来时 When, while, before, after, till, once, as soon as, so long as, by the time, if, in case (that), unless, even if, whether, the moment, the minute, the day, the year...