文档介绍：四级语法讲义
一：时态：所谓的"时态"，就是时间+状态。谓语动词的时态见下表：
1．主动形式
过去
现在
将来
过去将来
一般
did
do
will/shall do
should/would do
进行
was/were doing
am/is/are doing
will/shall be doing
/
完成
had done
have/has done
will/shall have done
should/would have done用于虚拟语气
完成进行
had been doing
have/has been doing
/
/
2．被动形式
过去
现在
将来
过去将来
一般
was/were given
am/is/are given
will/shall be given
should/would be given
进行
was/were being given
am/is/are being given
/
/
完成
had been given
have/has been given
will/shall have been given
should/would have been given
完成进行
/
/
/
CET-4 常考的三种时态：过去完成时；将来完成时；（现在/过去）完成进行时。
时间状语从句当中的时态：
一般过去时 所有的过去
用 一般现在时 表示 现在和将来
现在完成时 现在完成和将来完成
一．非谓语动词
一．不定式：
一）不定式的常考形式：
一般形式：He decided to work harder in order to catch up with the others.
被动形式: He preferred to be assigned some heavier work to do.
语法功能： 表示与谓语动词同步发生
完成形式：He pretended notto have seen me.
被动形式：The book is said to have been translated into many languages.
语法功能：表示发生在谓语动词之前
二）不定式常考的考点：
1）不定式做定语----将要发生
2）不定式做状语----目的
3）不定式充当名词功能---To see is to believe.
三)不定式的省略
1)感官动词 see, watch, observe, notice, look at, hear, listen to, smell, taste, feel
+ do 表示动作的完整性，真实性；
+ doing 表示动作的连续性，进行性
I saw him work in the garden yesterday.
昨天我看见他在花园里干活了。(强调"我看见了"这个事实)
I saw him working in the garden yesterday.
昨天我见他正在花园里干活。（强调"我见他正干活"这个动作