-2024届高三英语二轮复习“it”的用法总结 课件(共13张PPT)
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| 名称 | -2024届高三英语二轮复习“it”的用法总结 课件(共13张PPT) |  | |
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| 更新时间 | 2024-03-21 21:54:22 | ||
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(共13张PPT)
Grammar in Unit3
---”it”
考点一 it用作代词
1. 用作人称代词
（1）My friend offered me a beautiful gift, and I like it very much.
（2）What will you call it if it’s a boy
（3）---Who is waiting for you at the bus stop
---I have no idea. It may be my brother.
指前面的名词或上文提到的事
指婴儿(性别不明)
未出场的身份不明确的人
2. 用作非人称代词
1. It gets dark very early in the winter.
2. I love spring---It’s a wonderful time of the year.
4. It’s less than 100 kilometres from here to Jinan
3. It has snowed much this year.
指季节
指距离
指天气
指时间
5. It is too bad. There is much work for me to do today.
指一般的，笼统的情况
3. 指代this, that或不定代词something, nonthing.
Whenever she sees something that she likes, she goes and buys
it.
it作形式主语. It 可以用作先行词作为句子的主语,而把句子的真正
语移到后面去, 可以移到后面的主语是：不定式、动名词、从句
不定式: e.g.知道自己的局限性是很重要的。
It is important to know your limitations.
2) 动名词: e.g.为他工作很有意思。
It is fun working for him.
3) 主语从句: e.g.他居然还活着, 真是个奇迹。
It is a wonder that he is still alive.
考点二：用作形式主语
It作形式主语时的几个常见句型:
(1). It be + adj.+ (of / for sb.)+ to do sth.
of 时此处 adj. 通常为描述人的属性的形容词:
kind, unkind，nice ,rude，cruel，considerate，thoughtful，
careful，careless等。
e.g. It's kind of you to help me with the problem.
for时此处adj. 通常为描述事件的形容词：easy，difficult，hard，necessary，unnecessary，possible，impossible，likely，unlikely，right，legal，illegal，polite，impolite，clear，obvious，dangerous…
e.g. It is illegal（for a teenager）to drive a car without a license.
(2).It be + adj.+ doing sth.(常用的adj.有 useless, worthwhile)
e.g. It is useless asking him for help.
(3). It be + n.+ doing sth.(常用的名词有good, use, worth)
e.g. It’s no use crying over the spilt milk.
(4). It be + adj.+ that...(常用的形容词有necessary, important, vital, strange, natural, clear, possible, obvious, true,certain等)
e.g. It is important that he (should)be there on time.
(5). It be +done + that...(常用的过去分词有said, announced, believed, reported, known, learned, hoped, claimed, estimated等)
e.g. It was said that the earthquake had caused a lot of damage.
(6). It be +n.+ that...(常用的n.有pity, honour, shame, wonder, fact等)
e.g. It is a pity that you can't come.
it作形式宾语 当复合宾语中的宾语是不定式、动名词、宾语从句时, 往往把宾语放在它的补足语后面, 而用it作形式宾语, 放在宾语补足语之前。
Sb+make/ think/ believe/find/consider/feel +it+adj./n.+to do /doing/that….
We think it important to learn a foreign language.
He considers it his duty to help those at risk.
I think it no use arguing with him.
The school has made it clear over and over again that smoking is
banned in the school.
考点三：用作形式宾语
考点四：it的固定句型
(1). It remains to be done+从句...有待于
e.g. It remains to be seen whether making a trip often does good to the old couple's health.
(2). It +hits/strikes/occurs to sb +从句 某人突然想起...
e.g. It occured to me that we should start off at once.
(3). appreciate/hate/love/like/dislike后面由if或when引导从句时，中间用it,构成appreciate/hate/love/like/dislike+it+if/when从句
e.g. He will appreciate it if they invite him.
(4). 动词短语+it+that从句。动词短语有rely/depend on/upon, see to(负责，照料)，answer for(负担，担保)，ask for(请求)。
e.g. You can depend on it that she is always concerned about her own interests.
(5). 动词+it+介词短语+that从句
take it for granted that...认为...理所应当
owe it to sb that...把...归功于某人
leave it to sb that...把...留给某人
keep it in mind that...把...记在心里
e.g. Keep it in mind that you have to be home by 11 o'clock.
I
Mary
in the street
yesterday
It was I that/who met Mary in the street yesterday.
It was Mary that I met in the street yesterday.
It was in the street that I met Mary yesterday.
It was yesterday that I met Mary in the street.
it用于强调句
基本结构：It be + 被强调部分 +that /who +句子其他成分
I met Mary in the street yesterday.
1. It 无意义，不可换成this/that. 2. be 只用单数 is/was
3.被强调的部分不能为谓语动词. 4. 强调的部分是人 也可用who其它一律用that.
强调句的一般疑问句：
Is/Was it +被强调部分+that/who+其他成分？
e.g. Is it in the dining hall that they will hold a party
Is it professor Li who will come to our school to give us a
speech
强调句的特殊疑问句：
特殊疑问词+is/was it +that/who+其他成分？
e.g.How was it that they got to the top of that high mountain
※：当强调句的特殊疑问词作宾语时，语序为
特殊疑问词+it is/was+that/who+其他成分.
e.g. I really don't know where it was that I put my wallet after I paid the bill.
强调句的特殊结构：
当被强调的时not...until句型时，应将not与until部分一起进行强调，构成“It is/was not until...that...”结构。由于not已经移除，that后应用肯定句式。如：
1. He didn't come back until the next year.
It was not until the next year that he came back.
2. They will not leave here until they finish the project.
It is not until they finish the project that they will leave here.
1.It is time (about time /high time ) that sb. _______
did /should do
2. It is the first ( second ... ) time that ____________
was
3. It _____________+时间段....since … did 自…以来已经过了多长时间了
is/has been
4. It _____________+时间段... before ... 要过多久…才…
will be
It has been 5 years since he came here.
It is 2 years since he had breakfast .
It will be three months before he comes here.
have /has done
had done
it 指代时间的常用句型
Grammar in Unit3
---”it”
考点一 it用作代词
1. 用作人称代词
（1）My friend offered me a beautiful gift, and I like it very much.
（2）What will you call it if it’s a boy
（3）---Who is waiting for you at the bus stop
---I have no idea. It may be my brother.
指前面的名词或上文提到的事
指婴儿(性别不明)
未出场的身份不明确的人
2. 用作非人称代词
1. It gets dark very early in the winter.
2. I love spring---It’s a wonderful time of the year.
4. It’s less than 100 kilometres from here to Jinan
3. It has snowed much this year.
指季节
指距离
指天气
指时间
5. It is too bad. There is much work for me to do today.
指一般的，笼统的情况
3. 指代this, that或不定代词something, nonthing.
Whenever she sees something that she likes, she goes and buys
it.
it作形式主语. It 可以用作先行词作为句子的主语,而把句子的真正
语移到后面去, 可以移到后面的主语是：不定式、动名词、从句
不定式: e.g.知道自己的局限性是很重要的。
It is important to know your limitations.
2) 动名词: e.g.为他工作很有意思。
It is fun working for him.
3) 主语从句: e.g.他居然还活着, 真是个奇迹。
It is a wonder that he is still alive.
考点二：用作形式主语
It作形式主语时的几个常见句型:
(1). It be + adj.+ (of / for sb.)+ to do sth.
of 时此处 adj. 通常为描述人的属性的形容词:
kind, unkind，nice ,rude，cruel，considerate，thoughtful，
careful，careless等。
e.g. It's kind of you to help me with the problem.
for时此处adj. 通常为描述事件的形容词：easy，difficult，hard，necessary，unnecessary，possible，impossible，likely，unlikely，right，legal，illegal，polite，impolite，clear，obvious，dangerous…
e.g. It is illegal（for a teenager）to drive a car without a license.
(2).It be + adj.+ doing sth.(常用的adj.有 useless, worthwhile)
e.g. It is useless asking him for help.
(3). It be + n.+ doing sth.(常用的名词有good, use, worth)
e.g. It’s no use crying over the spilt milk.
(4). It be + adj.+ that...(常用的形容词有necessary, important, vital, strange, natural, clear, possible, obvious, true,certain等)
e.g. It is important that he (should)be there on time.
(5). It be +done + that...(常用的过去分词有said, announced, believed, reported, known, learned, hoped, claimed, estimated等)
e.g. It was said that the earthquake had caused a lot of damage.
(6). It be +n.+ that...(常用的n.有pity, honour, shame, wonder, fact等)
e.g. It is a pity that you can't come.
it作形式宾语 当复合宾语中的宾语是不定式、动名词、宾语从句时, 往往把宾语放在它的补足语后面, 而用it作形式宾语, 放在宾语补足语之前。
Sb+make/ think/ believe/find/consider/feel +it+adj./n.+to do /doing/that….
We think it important to learn a foreign language.
He considers it his duty to help those at risk.
I think it no use arguing with him.
The school has made it clear over and over again that smoking is
banned in the school.
考点三：用作形式宾语
考点四：it的固定句型
(1). It remains to be done+从句...有待于
e.g. It remains to be seen whether making a trip often does good to the old couple's health.
(2). It +hits/strikes/occurs to sb +从句 某人突然想起...
e.g. It occured to me that we should start off at once.
(3). appreciate/hate/love/like/dislike后面由if或when引导从句时，中间用it,构成appreciate/hate/love/like/dislike+it+if/when从句
e.g. He will appreciate it if they invite him.
(4). 动词短语+it+that从句。动词短语有rely/depend on/upon, see to(负责，照料)，answer for(负担，担保)，ask for(请求)。
e.g. You can depend on it that she is always concerned about her own interests.
(5). 动词+it+介词短语+that从句
take it for granted that...认为...理所应当
owe it to sb that...把...归功于某人
leave it to sb that...把...留给某人
keep it in mind that...把...记在心里
e.g. Keep it in mind that you have to be home by 11 o'clock.
I
Mary
in the street
yesterday
It was I that/who met Mary in the street yesterday.
It was Mary that I met in the street yesterday.
It was in the street that I met Mary yesterday.
It was yesterday that I met Mary in the street.
it用于强调句
基本结构：It be + 被强调部分 +that /who +句子其他成分
I met Mary in the street yesterday.
1. It 无意义，不可换成this/that. 2. be 只用单数 is/was
3.被强调的部分不能为谓语动词. 4. 强调的部分是人 也可用who其它一律用that.
强调句的一般疑问句：
Is/Was it +被强调部分+that/who+其他成分？
e.g. Is it in the dining hall that they will hold a party
Is it professor Li who will come to our school to give us a
speech
强调句的特殊疑问句：
特殊疑问词+is/was it +that/who+其他成分？
e.g.How was it that they got to the top of that high mountain
※：当强调句的特殊疑问词作宾语时，语序为
特殊疑问词+it is/was+that/who+其他成分.
e.g. I really don't know where it was that I put my wallet after I paid the bill.
强调句的特殊结构：
当被强调的时not...until句型时，应将not与until部分一起进行强调，构成“It is/was not until...that...”结构。由于not已经移除，that后应用肯定句式。如：
1. He didn't come back until the next year.
It was not until the next year that he came back.
2. They will not leave here until they finish the project.
It is not until they finish the project that they will leave here.
1.It is time (about time /high time ) that sb. _______
did /should do
2. It is the first ( second ... ) time that ____________
was
3. It _____________+时间段....since … did 自…以来已经过了多长时间了
is/has been
4. It _____________+时间段... before ... 要过多久…才…
will be
It has been 5 years since he came here.
It is 2 years since he had breakfast .
It will be three months before he comes here.
have /has done
had done
it 指代时间的常用句型