用it作形式主语写一个句子,代替句子

用it作形式主语写一个句子,代替句子,第1张

it做形式主语:例句:It takes him five hours to do the homework 他花了五个小时做作业。

to do the homework 是主语。

动名词做真正主语:Doing the homework is boring做作业很无聊。

不定式做真正主语:To do the homework is going to kill me我做作业就想死。

区别:外国人一般是把重要的或该句话想说的重点放在最后说,to do the homework比较长,所以用it做形式主语,不显得整个句子头重脚轻。况且it做形式主语时一般是有固定句型的。比如第一条例句的it takes sb sometime to do sth翻译成汉语时,it不用译出,而是把to do the homework翻译出。动名词一般表正在发生的事,不定式一般表将来发生的事。

区别后的那句话是语法书的原话。我高中时读到过。语法参考书《精英英语》上的。

it 在英语中可以做形式主语,可以代替那些成分?

it的用法总结:

1 可以做代词,指代无生命的东西或者不辨性别的人。

如: I bought a book yesterday, and I like it very much

whose baby is it

who are knocking at the door it's me

2 it做无人称代词,指代时间,距离,天气等。

如:it 's cold today it's nine o'clock it's a long way there

3 it做代词,在句子中做形式主语和形式宾语。

如: it took me 3hours to finish the work

I don't think it a good idea to stay here just waiting

It可以做什么的形式主语

通常用it 做形式主语,将不定式和动名词置于谓语后面,特别是主语较长时,或在一些习惯用法中。

1) 谓语是系表结构(be + 形容词 / 名词)时,常将不定式后置,构成句型 “it + be + 表语(形容词 / 名词)+ 不定式”。

例 1 It is my duty to care for that patient

照料那位病人是我的职责。(做主语的不定式to care for that patient 后置,it 为形式主语)

例 2 It is not an easy thing to master a foreign language

掌握一门外语不是件容易的事。

例 3 It isn’t right to speak ill of someone behind his back

在别人背后说坏话是不对的。

2) 当谓语是 take,make,pay,cost ,require, feel,need 等动词时,或者是与情绪有关的动词 delight,amuse,excite,annoy,irritate 等时,习惯上常用 it 做形式主语,并将不定式后置。

例 1 It takes only ten minutes to get there

到那儿只需十分钟。

例 2 It pays to be honest

诚实是不会吃亏的。

例 3 It feels good to stay away from the crowded city

能远离拥挤的城市,感觉真不错。

例 4 It annoyed her to see someone spit on the ground

看见有人随地吐痰让她很生气。

3) 同不定式一样,动名词也可用于“it + be + 表语 + 动名词”句型中,二者的区别可参见10.2.2 中1)的论述。下面两组句子没有多大差异。

例 1 A) It is a waste of time to argue with him

B) It is a waste of time arguing with him

和他争辩是浪费时间。

例 2 A) It is worthwhile to discuss this again

B) It is worthwhile discussing this again

这一点值得在讨论一下。

4) 但表语是(of)no use,not any use,not the slightest use, no good, not much good,fun等时,常用动名词(不用不定式)做主语并后置,用 it 做形式主语。

例如 It’s no use crying over spilt milk

覆水难收。

5) 动名词还可在 there be 句型中做主语(不能用不定式),常见形式为 “there is no + 动名词”或 “there is no / any + 名词 + 动名词”。

例 1 There is no denying the fact

事实无可否定。

例 2 There isn’t any use trying again

再试也没用。

^_^

英语中那些词性可以做主语那些不能

1 名词做主语:

Our school is not far from my house

2 代词做主语:

We like our school very much

3 数词做主语:

Two plus o is four

4 名词性或名词化的词、词组或短语:

This is an article

5 动名词做主语:

Seeing is believing

6 动词不定式做主语:

To do such a job we need a better knowledge

7 从句做主语:

What I mean is to work harder

8 名词做主语:

The mother with her child is ing to the school

形式主语只有一个it 吗?有没有其它词可以做形式主语?

当代英语中,通常用it 做形式主语,将不定式和动名词置于谓语后面,特别是主语较长时,或在一些习惯用法中。

1) 谓语是系表结构(be + 形容词 / 名词)时,常将不定式后置,构成句型 “it + be + 表语(形容词 / 名词)+ 不定式”。

例 1 It is my duty to care for that patient

照料那位病人是我的职责。(做主语的不定式to care for that patient 后置,it 为形式主语)

例 2 It is not an easy thing to master a foreign language

掌握一门外语不是件容易的事。

例 3 It isn’t right to speak ill of someone behind his back

在别人背后说坏话是不对的。

2) 当谓语是 take,make,pay,cost ,require, feel,need 等动词时,或者是与情绪有关的动词 delight,amuse,excite,annoy,irritate 等时,习惯上常用 it 做形式主语,并将不定式后置。

例 1 It takes only ten minutes to get there

到那儿只需十分钟。

例 2 It pays to be honest

诚实是不会吃亏的。

例 3 It feels good to stay away from the crowded city

能远离拥挤的城市,感觉真不错。

例 4 It annoyed her to see someone spit on the ground

看见有人随地吐痰让她很生气。

3) 同不定式一样,动名词也可用于“it + be + 表语 + 动名词”句型中,二者的区别可参见10.2.2 中1)的论述。下面两组句子没有多大差异。

例 1 A) It is a waste of time to argue with him

B) It is a waste of time arguing with him

和他争辩是浪费时间。

例 2 A) It is worthwhile to discuss this again

B) It is worthwhile discussing this again

这一点值得在讨论一下。

4) 但表语是(of)no use,not any use,not the slightest use, no good, not much good,fun等时,常用动名词(不用不定式)做主语并后置,用 it 做形式主语。

例如 It’s no use crying over spilt milk

覆水难收。

5) 动名词还可在 there be 句型中做主语(不能用不定式),常见形式为 “there is no + 动名词”或 “there is no / any + 名词 + 动名词”。

例 1 There is no denying the fact

事实无可否定。

例 2 There isn’t any use trying again

再试也没用。

PS最后一项中关于there be的句型,其实there be 只是倒装用法而已,不是there作形式主语

There 是不是也可以做形式主语?

不行,做形式主语的只能是it

上面那个句子只是个There be 句型

英语中什么成分可以做状语?

副词

介词短语

从句

以上是 经常 作状语 的

另外还有相当于 副词的 词

不定式

现在分词

过去分词

另外 还有

形容词短语

名词短语如 heart and soul/ day and night

单个的名词 不能作状语

有时单个 的形容词 可以。如he came back happy

现在分词 如 he walked along the river ,singing过去分词 the teacher walked out of the class room ,followed by the students with 的复合结构 he slept,with the window open 独立主格结构 the room is on the sixth floor ,its window facing the north形容词 短语 也可以 he walked in the street ,cold and hungry he was back home ,happy and gay

英语中doing(一类词)可以做主语,那么done可以吗

doing可以但done不能 To be done

那些词可以做形式宾语

it可以指代learning English well这个动名词短语,也可以是一个宾语从句的引导词;而在第二个例子里面,it是虚拟主语,那么important的后面就只能跟不定式,而不能跟动名词短语了。

嘿嘿,其实语法这种东西很活的,我上中学的时候一直搞不清楚状语和定语的区别,甚至连定语从句都不知道是什么含义,但是我的英语成绩一直是班上第一。所以,英语不能学死了,语言是活的~~更重要是语感,而不是形式化的语法。

在英语中,副词可以做宾语吗

不可以 宾语必须是名词性的词 如 名词 代词

是的

it

作形式主语,主要分为下列三种情况:不定式作主语、动名词作主语

名词从句作主语。具体分析如下

不定式作真正主语

主要用于下列句型:

⒈It

+

is/was

+

adj/n

(形容词或名词)

+to

do

sth

A

名词作表语。主要有a

pity,a

pleasure,an

idea等。例如:

In

fact________is

a

hard

job

for

the

police

to

keep

order

in

an

important

football

match

(2001上海高考题)

A

this

B

that

C

there

D

it

(答案为D)

动名词作真正主语

用于这种形式的是一些特定的形容词和名词。例如:

It

was

nice

meeting

you

见到你真高兴!

(分别时用)

它与不定式作真正主语的区别在于,动名词说到的动作已经发生。例如:

It

is

nice

to

meet

you

(刚刚见面时用)

it

作形式主语,动名词作真正主语主要用于下列句型:

It's

+n(名词或名词短语)/adj(形容词)+

doing

sth

1)下列形容词后常用动名词作真正主语:nice,good,useless,hard,foolish,enjoyable,worthwhile等。例如:

It

is

nice

talking

to

you

跟你交谈真是愉快。

It's

foolish

behaving

like

that

这样的表现是很愚蠢的。

It

is

useless

doing

that

那样做没用。

名词从句作真正主语

用it

作形式主语的结构主要用于下列句型:

It

+谓语+名词从句(主语从句、表语从句、同位语从句)

⒈It

is

+名词+从句:

这样的名词有a

fact,a

surprise,an

honor(非常荣幸),a

pity,common

knowledge(常识)等。例如:

It

is

common

knowledge

that

the

full

moon

brings

fair

weather

皓月兆天晴,这是常识。

当代英语中,通常用it 做形式主语,将不定式和动名词置于谓语后面,特别是主语较长时,或在一些习惯用法中

1) 谓语是系表结构(be + 形容词 / 名词)时,常将不定式后置,构成句型 “it + be + 表语(形容词 / 名词)+ 不定式”

例 1 It is my duty to care for that patient

照料那位病人是我的职责(做主语的不定式to care for that patient 后置,it 为形式主语)

例 2 It is not an easy thing to master a foreign language

掌握一门外语不是件容易的事

例 3 It isn’t right to speak ill of someone behind his back

在别人背后说坏话是不对的

2) 当谓语是 take,make,pay,cost ,require,feel,need 等动词时,或者是与情绪有关的动词 delight,amuse,excite,annoy,irritate 等时,习惯上常用 it 做形式主语,并将不定式后置

例 1 It takes only ten minutes to get there

到那儿只需十分钟

例 2 It pays to be honest

诚实是不会吃亏的

例 3 It feels good to stay away from the crowded city

能远离拥挤的城市,感觉真不错

例 4 It annoyed her to see someone spit on the ground

看见有人随地吐痰让她很生气

3) 同不定式一样,动名词也可用于“it + be + 表语 + 动名词”句型中,二者的区别可参见10.2.2 中1)的论述下面两组句子没有多大差异

例 1 A) It is a waste of time to argue with him

B) It is a waste of time arguing with him

和他争辩是浪费时间

例 2 A) It is worthwhile to discuss this again

B) It is worthwhile discussing this again

这一点值得在讨论一下

4) 但表语是(of)no use,not any use,not the slightest use,no good,not much good,fun等时,常用动名词(不用不定式)做主语并后置,用 it 做形式主语

例如 It’s no use crying over spilt milk

覆水难收

5) 动名词还可在 there be 句型中做主语(不能用不定式),常见形式为 “there is no + 动名词”或 “there is no / any + 名词 + 动名词”

例 1 There is no denying the fact

事实无可否定

例 2 There isn’t any use trying again

再试也没用

it

is

important

to

learn

english

well把英语学好很重要

这里的to

learn

english

well就是主语

it

的内容,it

即为一个形式主语,这是动词不定式做主语,it

也可以指一整句,比如,it

is

important

that

we

should

learn

english

well

学好英语对我们来说很重要,这里的we

should

learn

english

well就是形式主语

it

的内容。

主语从句中it做形式主语的常见句型有哪些?

常见句型有:

It + be + 名词片语 + 主语从句,这类名词有:a fact, a pity, a shame, an honour,a question

It + be + 过去分词+ 主语从句,这类过去分词有:announced, believed, expected, hoped, decided, reported, said, shown等,

It + be + 形容词+主语从句

It + 不及物动词(seem, appear, happen等) + 主语从句, 这类不及物动词有:appear, happen, seem等,

It + be + 形容词+ for  )+ 动词不定式  这类句型常用形容词easy, difficult, hard, important, possible,wise等作表语,有时候为了强调不定式动作的执行者,常在不定式前加for  ,

It + be + 形容词 + of   + 动词不定式,这类形容词常是表示心理品质,性格特征的形容词,如:kind, nice stupid, clever, foolish, polite, impolite, silly, selfish, considerate等。

It + be +名词片语 + 动词不定式

It + be + 名词或形容词+ 动名词

It + take (   )+ 时间(金钱)+ 动词不定式

用的比较少的 It + take (   )+ 时间(金钱)+ 动词不定式

举几个例子比如:

It took the workers almost three years to finish building the dam

It will take a whole day to get to the  of the mountain on foot

It作形式主语的常见句型有哪些

It作形式主语常见句型

动词不定式,动名词或主语从句作主语时,通常把它们放在谓语动词前,而用it作形式主语,放到句首,常见句型有:

1 It + be + 形容词+主语从句,如:

It is uncertain whether he can e to Jenny’s birthday party or not

2 It + be + 名词片语 + 主语从句,这类名词有:a fact, a pity, a shame, an honour,a question

等,

如:It’s a pity that you missed the exciting football match

It remains a question whether he will e or not

3 It + be + 过去分词+ 主语从句,这类过去分词有:announced, believed, expected, hoped, decided, reported, said, shown等,

如:

It is reported that 16 people were killed in the earthquake

It is not decided who will give the operation to the patient

4 It + 不及物动词(seem, appear, happen等) + 主语从句, 这类不及物动词有:appear, happen, seem等,

如:

It seemed that he didn’t tell the truth

It happened that I was out when he called

5 It + be + 形容词+ for )+ 动词不定式 这类句型常用形容词easy, difficult, hard, important, possible,wise等作表语,有时候为了强调不定式动作的执行者,常在不定式前加for ,如:

It’s necessary for the young to master o foreign language

It is unwise to give the children whatever they want

这类形容词有:easy, difficult, hard, important, possible,wise

6 It + be + 形容词 + of + 动词不定式,这类形容词常是表示心理品质,性格特征的形容词,如:kind, nice stupid, clever, foolish, polite, impolite, silly, selfish, considerate等。

某人和这些形容词可以构成主系表结构。如:

It’s very kind of you to help me with the work =You are kind to help me

It seemed selfish of him not to share his dictionary with others

=He seemed selfish not to share his dictionary with others

7 It + be +名词片语 + 动词不定式,如:

It is not a good habit to stay up too late

8 It + be + 名词或形容词+ 动名词,这类名词和形容词常常是:

good, no good, no use, a waste of, useless, senseless等,如:

It’s a waste of time talking to her any more

It is no use arguing about the matter with him

9 It + take ( )+ 时间(金钱)+ 动词不定式,如:

It took the workers almost three years to finish building the dam

It will take a whole day to get to the of the mountain on foot

if可以引导it做形式主语的主语从句吗

总的来说,严格的英语不可以,要用whether

美式英语非正式场合可以。

Whether it is right to do is not my business

这样做对不对不关我的事。

宾语从句“it”做形式主语的句子有哪些?

it 代替连词 that 引导的从句作形式主语

例句:It's said that Tom has e back from abroad

It was reported that dozens of  children died in the aident

it 代替连线代词或连线副词引导的从句作形式主语。

例句:It is still a question when we shall have our sports meet

我们将什么时候举行运动会还是一个问题。

It is uncertain whether he can attend this conference or not

他能否来开会还不能确定

it

英 [ɪt]  美 [ɪt]

pron环境;情况,局势;正是所需(要或想望)的事物;〈非正式〉 ; ;(儿童游戏中的)捉人者,找人者

ing 形式作主语的主语从句

你的描述有问题,主语从句:That he works hard makes him a suessful bussines an在主语从句里,不会出现ing做主语的形式,ing做主语是动名词做主语,举例:Swimming is a good sport

在复合句中做主语的从句叫主语从句?

如:What you have said is totally wrong其中what you have said 是主语从句

宾语从句it做形式主语的句子

It代替从句作形式主语的常见句型

1 it 代替连词 that 引导的从句作形式主语。

1) it + be + 过去分词 + that 从句:

It's said that Tom has e back from abroad

It was reported that dozens of children died in the aident

可用于该句型的过去分词还有:known , thought , told , believed , hoped , announced ,expected , decided , suggested等,该句型常可以转换成含有宾语从句的复合句或者含有不定式作主补的简单句。如:

It's said that Tom has e back from abroad

→People say that Tom has e back from abroad →He is said to have e back from abroad

2) It + be + 名词片语 + that 从句:

It's a pity that he can't swim for his age

It's a wonder that you could finish such a hard task in such a short time

可用于该句型的名词片语还有:an honour , a good thing , a fact , a surprise , good news等。

3) It + be /seem + 形容词 + that 从句:

It is likely that they will beat us tonight 今晚很可能他们会赢我们。

It doesn't seem that she will give us a hand 她帮我们的可能性似乎不太大。

可用于此句型的开容词还有;wonderful , true , good , right , wrong , (un)important ,useless , surprising , clear , possible , unusual , lucky , certain 等。

4) It + seem / appear / happen + that 从句:

It seems that he enjoys pop songs very much 看来他非常喜欢流行歌曲。

It appears that Tom might change his mind 看来汤姆会改变主意。

It happened that I went out that day 碰巧我那天外出了。

2 it 代替连线代词或连线副词引导的从句作形式主语。

1) It is known (not decided , not made clear , found out , discussed , being discussed , being considered , a question , uncertain等) + 连线代词或连线副词引导的从句。

It is still a question when we shall have our sports meet 我们将什么时候举行运动会还是一个问题。

It is uncertain whether he can attend this conference or not 他能否来开会还不能确定。

2) It doesn't matter(doesn't matter too much , doesn't make too much difference等) + 连线代词或连线副词引导的从句。如:

It doesn't matter whether we go together or separately 我们一起去还是分开去都可以。

It doesn't matter too much to me what you do or where you go 你做什么或去什么地方,对我都无关紧要

it引导主语从句和it做形式主语还有强调句型的区别

“it”引导主语从句和“it”做形式主语还有强调句型的区别:

it引导的主语从句,形式主语就是it,真正的主语在句子的后面,通常是to do的不定式短语。

而强调句的结构 it is/was+被强调部分+that/who+句子其余部分,结构词it is/was和that/who都是没有实际意思的,只是构成句子结构的词而已。这个强调句只能强调名词和代词,也就是主语和宾语,不能强调其他句子成分。

主语从句:It is kind of you to help me with my housework

强调句:It is you who help me with my housework

主语从句中it做形式主语的常见句型:

It + be + 形容词+主语从句,如:It is uncertain whether he can e to Jenny’s birthday party or not

It + be + 名词片语 + 主语从句,这类名词有:a fact, a pity, a shame, an honour,a question等,如:It’s a pity that you missed the exciting football match

It remains a question whether he will e or not

It + be + 过去分词+ 主语从句,这类过去分词有:announced, believed, expected, hoped, decided, reported, said, shown等,如:It is reported that 16 people were killed in the earthquake

it 做形式主语时、句子是主语从句么?

形式主语是动词不定式的一种,它也是逻辑主语, 可以把它归类到逻辑主语的第一种(不定式的逻辑主语) 用作宾语的不定式,用作目的状语,用作结果状语的不定式都是属于不定式的大概念里面的。 形式主语it 作为形式主语的it并无实际语义,只是为满足语法上的需要,避免句子头重脚轻,它代替 的是句子的逻辑主语,概括起来会有如下情况: 句子的逻辑主语为不定式 如:It is very kind of you to give me a hand in time It is my pleasure to address the meeting It was pretty hard for him to bring up the child on his own 句子的逻辑主语为从句 如:It so happened that the tickets were sold out It is extremely obvious that she has been lying about her identity It suddenly ourred to me that the message must have been hidden beeen the layers of the briefcase 句子的逻辑主语为动名词短语 这类句子远不如前面两种出现率高,主要在(no good, waste, useless, no use, dangerous)等词语的后面用 如:It is no use reasoning with him It is no good reading in dim light 作形式主语的代词只能用it ,不能用that,this等词。例如: 1) It is easier to lose friends than to make friends 交朋友难而失去朋友比较容易。 2) It is important for modern young people to master at least o foreign languages 掌握至少两门外语对于当代年轻人来说是很重要的。 以上两句中的it是形式主语,真正的主语是后面的不定式短语。 3) It is considered no good reciting without understanding 不理解的背诵被认为是没有好处的。 4) It is no use crying over spilt milk 覆水难收。 以上两句中的it是形式主语,真正的主语是V-ing形式。 5) It is a fact that English is being aepted as an international language英语作为一门国际语言正日益为人们所接受,这是不争的事实。(NMET,95) 6) It depends on the weather whether we will go 我们去不去得看天气行事。(其中的whether 不能换成if,因为if不能引导主语从句。) 以上两句中真正的主语是名词性从句。 it 作形式主语主要用于下列三种情况不定式作真正主语 主要用于下列句型: 1 It + is/was + adj/n (形容词或名词) +to do sth A 名词作表语。主要有a pity, a pleasure, an idea等。 例如: In fact________is a hard job for the police to keep order in an important football match ( 2001上海高考题) A this B that C there D it (答案为D) 再如: It is a great pleasure to do this 这样做多好啊。 It is a good idea to think this way 这样考虑问题是个好办法。 除be外,其他动词也有跟名词的情况。例如: It seems a pity to waste the food 浪费这些食物真可惜。 It requires efforts to master a foreign language 掌握一门外语需要种种努力。 B 形容词或形容词短语作表语。 分两种情况: 1) 下列形容词: kind, good, nice, clever, wrong, right ,foolish, wise, unwise, stupid, rude, careless, cruel, brave, naughty, polite, selfish等词作表语时,不定式前常可加一个由of引起的短语,来说明不定式指的是谁的情况。形容词表示不定式逻辑主语的特征,即形容词用来描述不定式行为者的性格、品行等。例如: It was foolish of you to leave school你中途退学,真是傻瓜。 It was brave of her to speak out in public 她能当众大声讲话,真勇敢。 这种of to do sth 句型,of 的宾语可以作句子的主语。上面两个句子可以改写为: You were foolish to leave school She was brave to speak out in public 2) 其他形容词作表语,常见的形容词有:necessary, hard, important, difficult, easy, possible,mon等。例如: It is necessary to use a short-wave radio to pick up the programmes 必须用短波收音机才能收到节目。 如果要说明不定式表示的动作是谁做的,可以在不定式前加for + 名词或代词 + to do sth(for 后的宾语不能作句子的主语)。名词或代词作不定式的逻辑主语,即表示不定式所指动作的执行者。在此句型中,形容词只对不定式行为者作某种描述,而不涉及其品行。例如: It is not hard for one to do a bit of good 对于一个人来说做点好事并不难。 It,s mon for leaves to fall from the trees in the fall 秋天树叶从树上落下是件常事。 需要注意的是:动词不定式作主语,一般情况下用it作形式主语,而把动词不定式(从句)放在后面。也可以直接用不定式作主语。例如: It is wrong to tell lies = To tell lies is wrong 撒谎是不对的。 但在疑问句和感叹句中,只能用it作形式主语。 例如: Isn't it a good idea to have a walk around 出去兜一圈难道不是一个好主意吗? What a pleasure it is to work with you! 同你一起工作是多么愉快啊! 2 It + v + to do sth 动词不定式作主语时除动词be以外,动词take, cost, need, require, make, sound, our 等也可用it作形式主语,而把动词不定式放在后面。例如: It took us three years to plete the project 我们花费三年时间才完成了这项工程。 It sounds reasonable to do it this way听起来这样做有道理。 It needed hard work to finish the job 要完成这项工作需要努力地工作。 It didn,t our to me to ask him to help me 我根本没想到要找他帮忙。 动名词作真正主语 用于这种形式的是一些特定的形容词和名词。例如: It was nice meeting you 见到你真高兴! (分别时用) 它与不定式作真正主语的区别在于,动名词说到的动作已经发生。 例如: It is nice to meet you (刚刚见面时用) it 作形式主语,动名词作真正主语主要用于下列句型: It's +n(名词或名词短语)/adj(形容词)+ doing sth 1)下列形容词后常用动名词作真正主语:nice, good, useless, hard, foolish, enjoyable, worthwhile等。例如: It is nice talking to you 跟你交谈真是愉快。 It's foolish behaving like that 这样的表现是很愚蠢的。 It is useless doing that 那样做没用。 2)下列名词或名词短语作表语时常用动名词作真正主语:use, good, fun, a waste of, job, task等。例如: It's a waste of time doing this 这样做是浪费时间的。 It's no good (use) doing that 那样做没好处(没用)。 It's an awful job doing this 做这事真是一件可怕的差事。 It's fun doing this 做这事真有趣。 It is not an easy task doing this work 做这工作真非易事。 名词从句作真正主语 用it 作形式主语的结构主要用于下列句型: It +谓语+名词从句(主语从句、表语从句、同位语从句) 1 It is +名词+从句: 这样的名词有a fact, a surprise, an honor(非常荣幸),a pity, mon knowledge(常识)等。例如: It is mon knowledge that the full moon brings fair weather 皓月兆天晴,这是常识。 It is a surprise that you gave such an answer to the question 你对这个问题作了这样的回答,令人吃惊。 2 It is +形容词+从句 : 这样的形容词有natural, true, strange, necessary, important, obvious(很明显), certain, wonderful, funny, possible, likely, probable等。例如: It is certain that free medical care will be given to most people in our city 我们城市的多数人将享受免费医疗,这是一定的。 It is probable that he has known everything 很可能他什么都已经知道了。 3 It +动词+从句: 这样的动词有seem,happen, appear, look, matter, make, strike, our(突然想起)等。 It appeared that he had a taste for music 看来他对音乐有一定的鉴赏力。 It made us very happy that she was saved她能化险为夷令我们大家很高兴。 4 It + be + 分词+从句: 这样的分词有 said(据说), reported(据报道),believed(人们相信),known(众所周知),decided(已决定),proved(已证实), thought, expected, annouced, arranged, amusing, puzzling, striking等。例如: It is said that Li Hao has been to Europe据说李郝去过欧洲。 It was amusing that a rabbit ran out of the empty box on the desk桌上的空盒子里竟然跑出来一只兔子,太有趣了。 需要说明的是,大部分连线词引导的主语从句都可以用 it充当形式主语。例如: It remains unknown when they are going to get married 他们何时结婚依然不明。 It says in the newspaper that the enemy has been defeated 报纸上报导敌人被打败了。 形式主语: It +be+(the)+adj+for +to do sth

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