It的用法与考考点精讲.doc

It的用法与高考 谈起it，真可谓词小作用大。it的用法一直是高考命题的热点,也是教学中的重点与难点。下面结合高考试题来对其常考点和特殊用法进行归纳。 一、it用作代词的用法 1.it用作人称代词，可指人，也可指物。用来代替前面已经出现的词、词组或句子，以避免重复。 1.I was disappointed with the film . I had expected ______ to be much better. ( 93 ) A. that B. this C. one D. it 2. —There is still a copy of the book in the library. Wall you go and borrow ? —No, I’d rather buy in the bookstore. one B. one; one C. one; it D. it; It 2．it 用来指代时间、地点、距离、天气、气候、季节、温度、环境等或虚指的情境。 例如：It was nearly midnight when she came back. 3．代替有生命但不能或不必分阴阳性的东西(包括婴儿)。 如：What a beautiful baby---- is it a boy? 4．指代心目中或上文中的人或事物。 3----Isn t that Anns husband over there? ----No, it ___ be him. Im sure he doesnt wear glasses.( 2004.全国.29 ) A. cant B. must not C. wont D. may not 4----Do you like _____ here? ----Oh, yes. The air, the weather, the way of life. Everything is so nice.( 2004.全国.32) A. this B. these C. that D. it it可以指代未指明,但谈话双方心里都明白的那件事或那种情况, 在本题情景中it指这儿的情况(the situation here)。 又如: I cant stand it (= this situation) any longer! Hows it (= your life, work, etc.) going? He is fifty, but he doesn’t look it.(fifty years old ) It还可以指已知的或暗含的事实或情况，例如： 5The Parkers bought a new house but _____will need a lot of work before they can move in. ( 2002.全国.25 ) A. they B. it C. one D. which 在此指买房之后的情况。 又如:She was frightened, but tried not to show it. 她非常恐惧,但竭力没有表现出来。 二、it可在句子中作主语或宾语，用来代替一个名词，一个短语，一个分句或一个句子，以避免它们在句子中的重复。为了避免句中作真正主语的动词不定式短语、动名词短语和名词性从句(一般都比较长)置于句首时造成头重脚轻，习惯上用it作形式主语置于句首，指代后面的真正主语，使句子显得流畅,保持句子的平衡。而且，作形式主语的代词只能用it ，不能用that，this等词. = 1 \* GB4 ㈠it作形式主语的用法 1.It + be＋形容词(＋for sb./ sth．) ＋动词不定式此句型中的形容词用来描述动词不定式所指代的事情的特点。相当于to do sth. is +adj+.for sb./ sth，用于此句型的形容词有：easy， hard， difficult，possible，important， impossible， necessary，good，bad，natural, safe, common, normal, dangerous, unusual, rare, pleasant等。 6 Is ___ necessary to tell his father everything? (87) A. it B. that C. what D. he 7 Is?____?necessary?to?complete?the?design?before?Nati