求过去完成时讲解RT.———————————————————————————————————

求过去完成时讲解RT.———————————————————————————————————
求过去完成时讲解
RT.
———————————————————————————————————

求过去完成时讲解RT.———————————————————————————————————
就是had加过去分词
新概念第2册的Lesson 14 Do you speak English?上是这样解释的：
在第1册的第119—120课,我们第一次接触到了过去完成时.有人认为,过去完成时是表示“很久以前发生的事情”,这个概念是错误的.过去完成时常常用来表示发生在过去的两件事、动作中哪一个发生在前.
（然后是几个例子）：
He finished work.He went home.他结束了工作.他回家了.
我们也可以说：
After he had finished work he went home.他结束工作后就回家了.
注意一下句子是如何连在一起的,要特别注意用斜体印出的词.（因为不能打斜体,所以我就用括号表明一下咯~）
The children ran away.They broke the window.孩子们跑了.他们打碎了玻璃.
The children ran away after they had broken the window.孩子们打碎玻璃之后跑了.
The sun set.We returnde to our hotel.太阳下山了.我们回到了旅馆.
As soon as the sunhad set we returned to our hotel.太阳一下山我们就到了旅馆.
He finished lunch.He asked for a glass of water.他吃完了中午饭.他要一杯水.
When he had finished lunch he asked for a glass of water.他吃完中午饭后要了一杯水.
I did not understand the problem.He explained it.我不懂这个问题.
I had not understand the problem until he explained it.在他解释之前我不懂这个问题.
这都是我一个字一个字打出来的,嘿嘿

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