【外研版】八上 Module6 Unit3 Language in use 模块语法活学巧练 习题课件

(共13张PPT)
动词不定式
1.动词不定式的基本形式
动词不定式的基本形式为“to+动词原形”。动
词不定式没有人称和数的变化,在句中不能作
谓语,但它仍保留着动词的特点,即可以有自己
的宾语和状语。动词不定式的否定形式是在不
定式符号“to”前加not
2.动词不定式的基本用法
动词不定式具有名词、形容词和副词的特征,因
此在句中可以作主语、表语、宾语、宾语补足语、
定语和状语
(1)作主语:为了保持句子的平衡,往往用it作
形式主语,而把不定式短语置于谓语动词之
后。句型为:Itis+ad).+ for sb.
to
do sth
eg: It's dangerous for you to climb that ta
tree。
(2)作表语:可以用在连系动词后作表语,表示
愿望、责任、义务等
eg: His wish was to become a scientist
(3)作宾语:多用在 decide, agree, would like,
hope,ask, learn, promise, refuse等及物动
词后面
eg: Ive decided to stay at home
(4)作宾语补足语:多用在tell,ask,want, order,
teach, Invite,wish,help,wan等动词的后面
eg My parents always tell me not to call others
ate at night.
(5)作定语:须放在所修饰的名词、代词之后,与
被修饰的词之间是逻辑上的动宾关系
eg He is looking for a room to live in
(6)作状语:可用作修饰动词或形容词的状语
般放在其所修饰的动词或形容词之后
eg: Last week i went to the library to
borrow some books on how to protect
environment
(7)“疑问词十动词不定式”结构可以用在疑问
词what,how,when, where, which等之后
作主语、宾语、宾语补足语等
eg Would you please tell me what to do
next
、单项选择。
(C)1.(广东) After long years of war,many
people in syria are homeless
i think it
Important
a peaceful world
a. build
B. not build
C. to build
D. not to build