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必修2《Using LanguageⅠ》精品教案优质课下载
1. I. 基本形式 to + 动词原形
(1) 肯定式： to do
I like to study with him.
我喜欢和他一起学习。
(2) 否定式：not to do
My mother tells me not to play with fire.
我妈妈告诉我不要玩火。
2.不定式的用法。 动词不定式具有名词、形容词和副词的特征，是非谓语动词；因此可在句中作主语、宾语、宾语补足语、状语、定语、表语等等。
1）动词不定式做主语的用法
To make a plan first is a good idea.
先制订计划是个好办法。
To see is to believe.
眼见为实 。
●常用it做形式主语，而不定式做真正主语。It be + adj. (for sb.) to do sth.
It is important for modern young people to master at least two foreign languages.
掌握至少两种外语对现代年轻人来说是很重要的。
It's easy for me to do that.
我做这事太容易了。
It's so nice to hear your voice.
听到你的声音真高兴。
It's necessary for us to practice English every day.
我们每天练习英语很必要。
● It is+ n.+ to do
名词通常是a pleasure, a pity, one’s duty, an honor, a shame, ...
It is a pity to miss the film.