特别提示:不定式作目的状语时,否定形式不能用not to do sth. 应用 in order not to do sth 或so as not to do sth.
I’m going to start now, in order not to miss the beginning. 我现在就出发为的是不错过开头。
重点关注:
1.It is + adj for sb to do 或 It is adj of sb to do
我们常用for sb 或of sb.来做不定式的逻辑上的主语。但是什么情况下用for 或of,主要从以下两方面来进行区别:
A: for sb 的句型通常使用表示客观情况的形容词。如: easy, difficult, hard, important, possible, impossible. necessary, unnecessary. Interesting等。如:
It is important for us to express our opinions.对于我们来说,表达我们的意见是很重要的。
It is hard for him to get rid of his bad habits.他很难改掉他的坏毛病。
B: of sb 的句型一般用表示主观感情或态度的形容词,如:good, kind, nice, wise, clever, silly. Stupid, foolish. right . wrong . careful. careless. polite. impolite, rude 等
It is clever of him to leave that country.
It was very kind of you to come to help me .你来帮我忙太好了。
2 疑问词+不定式在句中起名词的作用,可做主语,表语,宾语。
How to prevent from swimming in this river is a problem.
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