文档介绍：非谓语动词
（动词不定式，动名词，分词）
构成：动词
“to+动词原形"构成，
其否定形式是"not to +动词原形”
The infinitive
动词不定式
一、带to的不定式
用法
see is to
is very important to learn English well.
=To learn English well is very important.
it 是形式主语，不定式to 是真正的主语
To be here at Christmas time is my dream.
＿＿＿＿＿＿＿＿＿＿＿＿＿＿＿＿＿＿＿＿＿
It is my dream to be here at Christmas time.
, clever, kind, nice, good,
right, wrong等与人有关的“赞美”或“批评”时用
of.
It is +adj+of sb to do sth
It is +adj+for sb to do sth
辨析
It is clever of him to work out this difficult ，真聪明！
It is very difficult for me to work out this difficult problem.
（形容人的性格）
（形容事情的本质）
it作形式主语的两个重要句型
1）It’s very kind _____you to help me.
2）It’s necessary _____us to master a foreign language.
It’s nice _____you to invite us.
It’s interesting ______ us to play football.
of
for
of
for
挑战中考
2. ____ is very important to ban the people from using th plastic bags.
B. This
3. It is kind ____ him to be friendly ____me.
A. of; of B. for ;of C. to;of D. of; to
4 It is dangerous for me ___ in this deep river.
B. to swim C. swim
found that it is important to learn English well.
found it important to learn English well.
宾语从句
It 作形式宾语
think _____ necessary to protect our environment.
B. this
2. 用作宾语 (v. + to do )
I want to buy a computer.
She hopes to find a better job.
I wish to go with you.
归纳：常用不定式作宾语的动词词组
agree to do sth
decide to do sth
plan to do sth
begin/ start to do sth
promise to do sth
afford to do sth
would like to do sth
refuse to do sth
三用作宾语补足语
(v. + sb. + to do )
She asked me to help her.
The teacher told him to come on time.
Edison’s mother taught him to read and write.
want sb. to do wish sb. to do
order sb. to do allow sb to do
would