负责的近义词-鸳成语
英语语法学习---不定式(附练习题)
不定式
1.定义:具有名词、形容词及副词性质并具有时态、语态变化。
2.形式:(以do为例)
主动语态 被动语态
一般时 to do to be done
进行时 to
be doing
完成时 to have done to have been done
完成进行时 to have been doing
3.用法:
(1)用作主语:
To speak good English is not
easy.
or: It is not easy to speak good
English.
(采用形式主语 it 以避免头重脚轻)
It took me an
hour to do the work.
(2)用作宾语:
She decided
to take the examination.
I hope to meet him
soon.
(3)宾语补足语:
They expected us to help
them.