文档介绍：By Li Bin
动词不定式专题讲座
Language practice:
It was interesting to learn about Wolong Panda Reserve.
But it’s sad to think about all those animals in danger.
The surprising thing was to hear how many animals are in danger.
We need to protect them better.
It isn’t right to kill whales or elephants.
It’s hard to stop the killing.
当我们要表示“想做某事、需要
做某事或决定做某事”时,就会
出现两个动词连用的情况,这时
应如何表达呢?
同学们自然会想到want to do sth.,
need to do to do sth.
等表达方式。
主要行为动词后面的动词采用了
to+动词原形
的结构,我们把这种结构称为动词不定式
动词不定式没有人称和数的变化,在句子
不能作谓语。
1. 什么是动词不定式?
1) It’s +形容词(+for sb)+to do sth. 如: It is good to help others.
= To help others is good .
(帮助他人是件好事。)
It is exciting to surf the .
=To surf the is exciting .
(上网是件令人兴奋的事。)
2. 动词不定式的常见句子形式:
2) 人+be+形容词+to do sth
The children are very happy to hear from their teacher.
孩子们收到他们老师的信,非常高兴。
Tom was surprised to meet his uncle in
Beijing yesterday.
昨天在北京见到叔叔,Tom 很吃惊。
3)物+be+形容词+to do
The problem is a bit difficult to answer.
这个问题回答起来有点难。
These apples are not sweet to eat.
这些苹果吃起来不甜。
,修饰名词
不定式可以放在名词的后面修饰名词,起形容词的作用。请看下列句子:
I have a lot of homework to do.
我有很多作业要做。
I’m hungry. Give me something to eat, please. 我饿了, 请给我点吃的吧。
:翻译成“为了……”
I came to Beijing to see my grandpa.
= To see my grandpa, I came to Beijing .
我来北京看望我爷爷的。
He reads English every morning to study English well.
=To study English well, he reads English every morning.
为了学好英语,他每天早晨读英语。
6. 放在be后面,作表语
如:Our duty today is to clean the floor.
今天我们的任务是打扫地板。
Their jobs are to clean the room every day.
他们的工作就是每天打扫房间。
His advice is e here before 8:00am.
他的建议是8点钟以前到这儿。