it用法大全(形式宾语形式主语)教学文案

. it 用作形式主语
.1 it代替主语从句
1）It is + adj. +that从句
① It is clear ( obvious， true， possible certain....) that ..... “清楚（显然，真的，肯定．．． ）”
It is very clear that he’s round and tall like a tree.
②不管被强调部分是哪种状语，只能用 that连接，不得使用where、when等连词.
It was in the street that I met your father yesterday．
③被强调部分为人时，可用who(主格或宾格)和 whom(宾格)代替that，用that也行。
1) It was your father that/whom /who I met in the street yesterday．
用过去时态表示虚拟．常译为“是（正是）．．．的时侯．． ．” / should+原型
It is time that children went to bed. It is high time that the children should go to school.
3. It is the first ( second ... ) time that ... “是第一（二）．．．次．．．”。 该句型中的 that 从句用完成时态。如果主句动词be是一般现 在时，后面从句用现在完成时态；如果主句动词be是一般过 去时，后面从句则用过去完成时态。该结构中 that 可以省去 。例如： It was the first time that I had been praised.
难怪他不愿去。 在该句型中如果用肯定形式，表示“真奇怪， 真是令人惊讶”；
It is a wonder that he reused such a good offer.
真奇怪，他拒绝了这样好的帮助。
4). It+v+that从句 It happens (seems， looks， appears ) that...
2) It was I that/who met your father in the street yesterday．
④强调句中也要注意主谓一致、人称一致和否定转移 的问题。
It is they who are our friends． It was not until ten o'clock that we got home last night．
该句型中it是形式主语，that 引导的是主语从句，主 句中的happen ， seem等词是不及物动词。
It happened ( so happened ) that he met his teacher in the street. 碰巧．．.
It is suggested that the meeting ( should ) be put off.
3）.It +n+that ... 1. It is a pity ( a shame ... ) that ...
that后的从句一般用虚拟语气（should + 动词原形） ，should可省去．表示出乎意料，常译为“竟然”。没有 这种意义时，则不用虚拟语气。
A. it, it
B. what, what
C. it, what
D. what, it
㈡.引导词it 1. It is + 被强调部分 + that ...
使用该句型有以下几点请注意： ① 强调句的谓语is或was永远用单数.
It was yesterday that I met your father in the street．
it用法大全(形式宾语形式主语)
㈠ 1.it作人称代词
Everyone knows that _______ is dangerous to play with fire, but _______ is difficult is to prevent children from playing with fire.
②. It is important ( necessary， right， strange， natural...) that ... that 后的从句中要用虚拟语气（should + 动词原形） ，should 可以省去，建议记住该句型中的形容词。 It is important that we (should) learn English well.
It is a pity that such a thing ( should ) happen in your class.
It is a pity that he is ill.
2. It is time ( about time ，high time ) that ... 该句型中that 后的从句应该用虚拟语气，值得注意的是常
2）.It is +v-ed +that 从句 ① It is said (reported， learned....) that ...
据说（据报道，据悉．．．）“。 It is said that he has come to Beijing.
= He is said to have come to Beijing.
②. It is suggested ( ordered / demanded/ insisted/ commanded... ) that ...
主句中的过去分词是表示请求，建议，命令等词时， that 后的从句要用虚拟语气（should + 动词原形）， should 可以省；常译为“据建议；有命令．．．）
It is the first time I have been here. = This is the first time I have been here.
Hale Waihona Puke Baidu
4. It is no wonder that…
It is no wonder that he didn’t want to go. ＝No wonder he didn’t want to go.