中考专项 复习 动词不定式（无答案）.docx

中考专项 动词不定式一、学习目标1.掌握不定式的概念和基本用法 2.掌握不定式在句中的作用 3.掌握不定式的重要句型二、知识讲解（1）动词不定式的基本概念 动词不定式的基本形式是 to + 动词原形，有时可不带to。 （2）动词不定式的基本用法 1. 动词不定式没有人称和数的变化。 2. 动词不定式在句子中可以担任除了谓语之外的任何成分。观察句子，写出不定式所做的成分To grow more trees here is very important.To think carefully before you act is necessary.To walk to school takes me twenty minutes. 所作成分： 句型转化：To grow more trees here is very important.=It’s very important to grow more trees here.2. To think carefully before you act is necessary.=It’s necessary to think carefully before you act.To walk to school takes me twenty minutes.=It’s twenty minutes to walk to school.注意：It’s … to do 句型： It 作形式主语， 真正的主语是不定式。观察句子，写出不定式所做的成分His wish is to become a scientist.Our duty is to protect the environment.The first important thing is to save their lives. 所作成分： 注意：当不定式作主语的句子中又有一个不定式作表语时， 不能用It is… to do的句型。例如：To see is to believe. 百闻不如一见。 观察句子，写出不定式所做的成分She wanted to get home earlier that day.They refused to do so.I hope to visit my grandparents soon. 所作成分： 注意：不定式用在及物动词后，担当宾语。常见的及物动词有： 观察句子，写出不定式所做的成分I asked him to help us.The soldiers forced us to open the door.They encouraged him to work hard. 所作成分： 观察句子，写出不定式所做的成分He got up early to catch the train.He came to give us a talk yesterday.I went to a park to breathe the fresh air. 所作成分： 注意：针对”why…?”（为什么……呢？）的疑问句作答时 一般来讲，用because…（因为……）回答，表明其理由、原因。但当回答表示目的“为了……”时，可用不定式代替作简略回答。 例句A: Why did you go to the library?B: To study English.A: Why does Mary get up early every morning?B: To catch the first bus to school. 观察句子，写出不定式所做的成分I am glad to be here.I am sorry to trouble you.We were surprised to find him there. 所作成分： 注意：不定式放在glad，happy，sorry之类的表达感情、情绪的形容词后面来修饰该形容词，表示“因为……而……”的意思。 如： Be glad + to do sth. 很高兴…… Be happy + to do sth. 很高兴…… Be sad + to do sth. 很悲伤…… Be sorry + to do sth.很抱歉、遗憾…… Be stupid + to do sth. 很愚蠢……另外，有些由过去分词转化为形容词的句型也经常使用： Be interested + to do sth. 很感兴趣…… Be satisfied + to do sth.很满意…… Be surprised + to do sth.很惊讶…… Be worried + to do sth.很担心……观察句子，写出不定式所做的成分Mr. Wang is a man to believe in