ere not. Р注: 1) was not常缩略为wasn‟t; were not常缩略为weren‟t。Р2) 一般过去时与过去进行时用法的比较: 一般过去时表示在过去某个时间发生过的动作或存在的状态, 而过去进行时则表示在过去某一时刻或某一段时间正在进行的动作。例如: David wrote a letter to his friend last night. 大卫昨晚给他的朋友写了封信。(信写完了。) David was writing a letter to his friend last night. 大卫昨晚一直在给他的朋友写信。(信不一定写完。) Р 4.过去进行时中的when和while when, while 区别: 1) 由when引导的时间状语从句,主句用过去进行时,从句应用一般过去时; 由while引导的时间状语从句,主句用一般过去时,从句应用过去进行时。 When the teacher came in, we were talking. 当此句改变主从句的位置时,则为: While we were talking, the teacher came in. 2)如果从句和主句的动作同时发生,两句都用过去进行时的时候,多用while引导。如: They were singing while we were dancing. РUnit 6 An old man tried to move the mountainsР一、重点短语Р1. work on doing sth. 致力于做某事 2. as soon as ...... 一……就…....Р3. once upon a time 从前 4. continue to do sth. 继续做某事Р5. make sth. happen 使某事发生 6.try to do sth. 试图做某事
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