一般现在时do/doesis +doneevery day, every year, often, usually
一般过去时didwas+donelast year, last Friday, in the past, two days ago, just now，in1996
现在进行时is doing is being +donenow, at present, this week, these days
过去进行时was doingwas+being doneat 8 yesterday, at this time yesterday,含when he came in 等的主句
将来进行时will be doing(will be being +done)at 8 tomorrow, at this time tomorrow, 含when he arrives in sp 等的主句
现在完成时have done(would be being +done)by now, up to now, up till now, so far. for+时间段，次数等
in the last/past +时间段
This is the +次数+that 从句；
This is +最高级+that从句
5. already,yet( ),recently, just, this morning, this year，ever，never等
过去完成时had donehad been+done1.by+过去的时间，时间段+before，before+过去的时间点， had hardly done…when;
had no sooner done…than等。）
2.had hoped, had planned等表过去没有实现的计划打算希望等。
is going to dowill be+done
is going to be+donenext year,2 hours later, When he comes back, in+时间段
was going to dowould be+done
was going to be +donethe next day等
现在完成进行时have been doing 无被动1.含since +过去时间的主句。
2.in the last/past +时间段
3.all morning ,all night，all these days等
**时间条件状语从句表将来/固定时刻表将要发生的动作.He gets up early every day.
Chen Wei likes English.
Time is money.
**If you come tomorrow, I'll tell you .
The planes arrives at 2.
He went to school on foot when he was young.
He stayed there for a month and came back.
Oh, it's you! I didn't know you were here.
* 表将来We 're having a class now.
We are reviewing grammar these days.
It's getting warmer and warmer.
He is forever working.
He is leaving for Beijing tomorrow.
When sb+saw/arrived/came,另一人正在做某事He was watching TV at 8a.m yesterday.
They were building a bridge last winter, but I don't know if it is completed.
*When he was riding a bike ,he fell down.
When we saw him, he was singing.