8种时态 标志性 关键词

确定时态的方法 1，关键词
2，根据语境理解并选用合适的时态
3,前后仔细分析
1.一般现在时
关键词sometimes, often, usually, always, every day, on Sunday afternoon, at 10 o'clock，in the
morning, five days a week, three times a month,
if when as soon as unless引导的条
件状语从句或时间状语从句等. ( If he comes ,I’l tell him the truth.)

2.现在进行时
关键词now, right now, at the moment, It's+几点钟等的句子或look, listen, keep quiet,when 等
When my mother comes ,I am doing my homework .提示语
3.一般将来时
关键词:tomorrow, tomorrow morning, at seven o'clock，tomorrow evening, next year, at ten
o'clock next Sunday, this year, at the end of this term, from now on, in the year 2008, soon, in a
few days' time, in the future ,
in 2020,the following day

4.一般过去时
关键词:yesterday,yesterday morning,last week, last year, at the end of last term, 一段时间+ago
如:ten years ago, five hours ago, on January 1st,2004, in the1980s
Just now,in the old days, long ago, a moment ago

5.过去进行
at ten o'clock yesterday morning, at this time last Sunday ,
when he came in
when (When my
mother came home ,I was doing my homework.)
6，
过去将来时: (过去的时间 + 将来时间关键词）
过去将来时表示在过去某个时间看来将要发生的动作或存在的状态。

过去将来 时常用于宾语从句和间接引语中。条件状语从句和时间状语从句中须用一般过去时
代替过去将来时。例如 ：
He said he would come to see me soon.
I didn’t know when she would come， but when she came I would let you know.


7.现在完成时
关键词:already, yet, just, ever, never ,so far, for +一段时间,since+时间或过去时从句,these five
years alone这五年以来在过去的十年中, the first time the second time
once
twice ,there times ,where is he ? He has gone to library,by the end
of this weekmonthyear，before (I haven’t seen her before)等.

8.过去完成时
关键词:by+过去某一时间点
如:by last year, by the end of+过去某一时间点，如by the end of last year,
before+过去某一时间点,by the time +从句
He had returned the book to the library by the end of last week.