1、时态语态表格

2、时态的组成：时间+状态

3、三大重点时态

①一般现在时 do/does(am/is/are done)      描述现在时间的客观情况

People often decorate their houses with holly at Christmas.

China is regarded as the largest tea-producing country.

②一般过去时 did(was/were done)      描述过去的动作/过去是，现在不是了

When I was a child,I played football nearly every day.

I didn't sleep very well last night.

③现在完成时 have done(have been done)      描述过去到现在的动作

Up to now,he has helped many people to be reunited with their family.

We are proud of what our country has achieved in the past seventy years.

高频时间标志词：

⑴until now/by now/up to now/so far

⑵since+过去时间

⑶in/over the past/last+时间段

⑷for+时间段

④现在完成进行时 have been doing      描述过去到现在一直进行的动作 （将来也继续）

I have been working on my paper in the last 3 hours.

It has been raining since last week.

⑤过去完成时 had done(had been done)      比过去动作/时间还早发生（过去的过去）

At the station,I was told that train had left five minutes before.

By the time dale was a senior, he had won every top honor in speech.

⑥过去将来时 would do(would be done)      在过去动作/事件之后发生（过去的将来）

At the begining of the year 2020,students never thought they would have such a long winter vacation.

使用场景Top1:宾语从句

4、时态辨析

He graduated from college in 2015.                  

He had worked as a teacher before he graduated.

He has been a teacher foe many years.

He has been trying to slove the problem in the past 3 hours, but doesn't know the answer.