e crm分为几个领域:英语句子的时态

句子的时态一般分为以下几种：
嗯。首先是最常用的一般现在时：do/does something
然后是一般过去时：did something
然后是一般将来时：will do/be going to do something有时候也常会用到这个句型：be to do 这也表示一种将来时的用法……
然后是现在进行时：be doing
然后是过去进行时：was/were doing
然后是现在完成时：have/has done something
然后是过去完成时：had done something
然后是过去将来时：would/should do was/were going to do something
然后是过去完成时：had done注意：这种语态与现在完成时的区别。这种语态是用来表达对过去的过去的这段时间来说的，而现在完成事实根据过去的时间短来说的。两者所标示的概念不同。
然后是被动语态：
有一般被动：be done
过去被动：was/were done
将来被动：willbe done
然后是比较难一点的时态。这些事态大多数是根据基本时态演变而来的，大体有以下几种：
一般完成时的被动语态：have/has been done
过去完成时的被动语态;had been done
过去进行被动时：was/were being done
过去进行时;was/were dong
嗯。当然除了固定语态外，还有许多固定词组也可以用来表示时态。be used to doing 意为“过去常常做某事”。

有16个，常用9个
常用的：
一般现在时 do/does
一般过去时 did
一般将来时 will do/be going to do...
过去将来时 would/shoud do
现在进行时 be doing
过去进行时 was/were doing
现在完成时 have/has done
过去完成时 had done
现在完成进行时 have/has been doing

不常用的：
将来进行时 will/shall be doing
过去将来进行时 would/should be doing
将来完成时 will/shall have done
过去将来完成时 would/should have done
过去完成进行时 had been doing
将来完成进行时 will/shall have been doing
过去将来完成进行时 would/should bave been doing

Present simple一般现在时(常与often ,always, sometimes搭配)
I like him,but he doesn't like me.

present continuous现在进行时(常与now搭配)

I am studying now.

Past simple一般过去时(常与yesterday,the day before,last year/week搭配)

I went to the park yesterday.

Future一般将来时(常与tomorrow,some day ,one day搭配)

He will go there tomorrow.

Past continuous过去进行时
She was doing her homework.

Past perfect现在完成时(常与yet,already,for搭配)

He has already done it .

Present perfect continuous现在完成进行时
He has been waiting for me for 2 hours.

Past perfect过去完成时
She has read the book.

Past perfect continuous过去完成进行时
He had been spoken for 3 hours.

Future perfect 将来完成时
I will have finished my homework then.

Feture continuous将来进行时
I will be sitting there at 6 o'clock.