高考英语语法教学-It的用法ppt课件

1、1. it作人称代词,代替前面提到的事物.2. it指代时间,季节,距离.3. it作形式宾语,常用在6123结构中.(think , find, make, believe, )4. it作形式主语. 当动名词,不定式,从句作主语时,常用it作形式主语.5. It is that.的强调句型.内容提要内容提要1代替上文中提到过的人或事物。指代人时，一般用于小孩或身份不十分明朗的人。 例如：Who is the baby? Its my teachers sonWho is that gentleman?Its my friend, TomHe (不可用It) wants to see you

2、 【典型例题】【典型例题】 (NMET2001) ) The Parkers bought a new house but _ will need a lot of work before they can move in. A. they B. it C. one D. which B B2用于表达天气、环境、时间、距离、季节等。 Its half an hours walk from here to our school Its nice and warm hereBut its two oclock now, and its time for us to go to school 注意下

3、列几种表示时间的句型注意下列几种表示时间的句型 . .It is time ( about time ,high time ) that . Its high time that we left.It is the first ( second . ) time that . Its the first time that I have been praised.It is . since . Its three years since they got married.It is / was . when . It was 1949 when the PRC was founded.It i

4、s / was . before . It will be two years before we meet again.3. We think it important to learn a foreign language.该句型中的it 作形式宾语。为了记忆方便我们可称该句型为“6123结构结构”。 6 指主句中常用的动词：think, believe, make, find, consider, feel； 1 指的是形式宾语 it； 2 指的是宾补的两种形式：形容词或名形容词或名 词；词； 3 指的是真正宾语的三种形式：不定式短不定式短 语语, , 动名词短语或动名词短语或 that

5、 引导的宾语从句引导的宾语从句。 4. It is necessary ( for sb. ) to do sth. 此句型中的真正主语是不定式短语，主句中的形容词通常是表示重要性，紧迫性，频繁程度，难易，安全等情况的形容词，常见的形容词有： important, necessary, natural easy , safe , common , normal , hard , difficult ,dangerous , unusual, rare , impossible , pleasant在在中的形容词作表语可以用从句改写，中的形容词作表语可以用从句改写，如：It is importa

6、nt for her to come to the party. = It is important that she (should ) come to the partyIt作形式主语时的几个常见句型作形式主语时的几个常见句型: . It is kind ( of sb. ) to do sth. 该句型中的不定式如果须要逻辑主语，则须要前置介词 of, 而句型中的形容词必须是能表示逻辑主语特征的形容词，常见的有： bad , brave , careless, clever , cruel , foolish , good （好心的）, honest , horrible , kind

7、, lazy , modest , naughty , nice（有教养的）, polite, rude , silly , stupid , wise , wrong 这个句型可以改写为：sb. is kind to do sth. . It takes sb. . to do sth. “做要花某人” It took me ages to repair my computer. It is no good (use ) doing sth. 该句型中的真正主语是动名词短语，主句中的表语可以是 no good , no use , no value, no importance Its no

8、 use crying over the spilt milk. It doesnt matter whether ( if ) . 不论（是否）没关系 It doesnt matter whether he is for my plan or not. It happens (seems, appears ) that. It happened that I had seen this problem in some book. It is said (reported, learned.) that . “据说”（据报道，据悉） It is said that he has gone to

9、 New York to attend a medical meeting. . It is a pity ( a shame . ) that . It is a pity that we have lost the match with a close score. It is important ( necessary, right, strange, natural.) that . 记住that 后的从句应用虚拟语气（should + 动词原形），should 可以省去. It is suggested ( ordered . ) that . that 后的从句要用虚拟语气（sho

10、uld + 动词原形），should 可以省常译为据建议；有命令） . It is up to sb. to do sth. 该句型为“该由某人做”。该句型中 up后的to是介词。 It is up to him to clean our classroom today. 今天应由他做教室清洁。 It is up to parents to teach their children manners. 该由父母教孩子礼貌。 5. It is + 被强调部分 + that . 将被强调的部分放在前面，其它部分置于 that 之后被强调部分可以是主语，宾语，表语或状语强调的主语如果是人，that 可

11、以由 who 换用如果把这种句型结构划掉后，应该是一个完整无缺的句子这也是与其 它从句区别判断的方法: It is not until + 被强调部分被强调部分 + that . 强凋“直到才”，需将 not 置于 until 之前 It was about 600 years ago _ the first clock with face and an hour hand was made (NMET97，单项填空)AthatBuntil CbeforeDwhen _computers play such an important part in our daily life?AWhy it is thatBWhy is it thatCWhy was it that DWhy is it B BA A3. It was only when I reread his poems recently _I began to apprec