Lesson 117 Tommy's breakfast
过去进行时和过去完成时
过去进行时表示的概念: 在过去某个特定的时间正在进行或发生的动作。
2 当过去的一个动作发生的时候另外一个动作正在进行。
结构:
主语+ was(were)+ doing
I was sleeping at eight o'clock yesterday morning.
They were swimming in the river at three o'clock yesterday afternoon.
at this time 这个时候
I was walking in the street at this time last week.
I was leaving the house when he arrived.
when 当……的时候
while 当……的时候(强调两个动作的同时进行)
just as 正当……
I cut myself while I was shaving.
I cut myself badly while I was shaving.
过去完成时:过去某个特定的时间之前动作已经完成。过去两个动作的比较,发生在前面的是过去完成时,后面的是一般过去时。
结构:
主语 + had + 动词的过去分词
I had read five books by the end of last year.
term
learnt
The students had learnt two thousand words by the end of last term.
before, after
Mr.Smith bought a new car after he had sold his old car.
We had had dinner before they arrived.
When I was leaving the house he arrived.