2025届高三英语二轮复习专项:it 形式主语、形式宾语 课件(共17张PPT)

(共17张PPT)
it 做形式主语
empty subject
That a single man in possession of a good fortune must be in want of a wife is a truth universally acknowledged.
有钱的单身汉都要娶位太太，这是一条举世公认的真理。
--Pride and Prejudice
头重脚轻
It is a truth universally acknowledged that a single man in possession of a good fortune must be in want of a wife.
1. 含义：
英语中为保持句子的结构平衡，避免头重脚轻，常用it做形式主语代替句子的真正主语，但it没有实际含义。
2. 用法：
①It 代替不定式
A. It is/was +adj.+(of/for)+to do for: adj.修饰事情（做某事对某人怎样）
对某人来说做某事是...样的 of: adj.修饰人 （某人怎样）
It is important/ vital/ necessary/ impossible for sb. to do
It is foolish/ polite/ kind of sb. to do
B. It is/was +n. 短语+to do 做某事是...的
It is time to do 到了做某事的时间
= for sth.
It is one’s turn to do 轮到某人做某事
It is my great honour to do 做...是我的荣幸
C. It takes/took sb.+时间+to do 做某事花费了...时间
Review：几个花费
spend ：主语“人” spend +时间/金钱 in doing
cost ： 主语“物” sth. cost sb.+钱
pay ： 支付 sb. pay+钱 for sth.
pay for sb. 替某人付钱
take ： 形式主语 It takes/took sb.+时间+to do
2. 用法：
②It 代替动名词
A. 表语是nice, good, enjoyable, awful, worthwhile, useless, no use等形容词时
B. 表语是fun, a waste of, job, task, 等名词或名词短语时
It's a waste of time/ money doing this.
这样做是浪费时间/钱。
I think it is worthwhile having/to have such a companion.
我认为有那样一个伙伴是值得的。
2. 用法：
③It 代替从句
A.
It be + n.短语+that...
It is a fact that ... 事实是...
It is a pity that ... 可惜的是...
It is a shame that ... 遗憾的是...
It is good news that ... ...真是太好了
It is no surprise that ... 并不奇怪...
It is an honor that ... 真荣幸...
It is my belief that ... 我相信...
2. 用法：
③It 代替从句
B.
It be + adj.+that...
It is clear/obvious that ... 显然...
It is possible/likely that ... 很可能...
It is natural that ... 很自然...
It is certain that ... 可以相信...
It is strange that ... 奇怪的是...
It is fortunate that ... 幸运的是...
2. 用法：
③It 代替从句
C. It + v.(单三/过去式）+that...
It seems/appears that ... 似乎是这样...
It happens that ... 碰巧发生...
It turns out that ... 结果证明是...
2. 用法：
③It 代替从句
D.
It +be done+that...
It is said that ... 据说...
It is reported that ... 据报道...
It is (generally) believed that ... 人们相信...
It is known that ... 众所周知...
It is expected that ... 有望...
It is proved that ... 已证实...
It is announced that ... 已宣布...
It 做形式宾语
empty object
1. 含义：
当不定式(短语)、动名词(短语)或从句在句中作宾语时，为使句子结构平衡，常用it作形式宾语，将真正的宾语后置。
They find it interesting to go to the movies.
I could appreciate it if you could come to my birthday party.
2. 用法：
① 动词+it+宾语补足语+不定式/动名词/从句
think, believe, make, find, consider, feel, take, support, regard...
The meeting is to make it clear how the project should go on.
本会议旨在明确项目应如何继续。
I feel it a geat honour to be invited to speak at the meeting before many students.
被邀请在会议上的这么多学生面前发言，我感到非常荣幸。
2. 用法：
②动词+it+when/if从句。
常见于appreciate, enjoy, like, dislike, love, hate, prefer等少数表示情感态度的动词之后。
He hates it when people use his bike.
他讨厌别人用他的自行车。
I enjoy it that everyone had a good time.
每个人都玩得高兴我很开心。
2. 用法：
③ 动词+介词构成的固定词组，如果介词后跟宾语从句，必须用： 动词+it+介词+名词+从句
leave it to (由...决定/判断)
owe it to sb (归功于/多亏)
take it for granted (想当然/认为..是真的)
have/bear/keep it in mind (记住)
bring it to one’s attention (引起某人注意)
2. 用法：
④ Rumor has it that... 谣传……
Legend has it that... 传说……
Rumour has it that Kim is not his student.
据说金不是他的学生。
Legend has it that Wu Song is buried at Hangzhou.
传说武松葬在杭州。