英语选修6 unit3语法 it的用法
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It seems that we have made a mistake.
= We seem to have made a mistake.
8. It vt+ 宾语+
that-clause to do sth.
It requires a lot of patience that we teach them English. It requires a lot of patience to teach them English
第三类：It is... that从句.(有4种) 4. It + be + adj. + that从句.
It is very clear that he’s round and tall like a tree.
It is certain that everything will get on well due to our hard work.
第一类：It is ...to do. (有2种)。 第二类：It is... doing. (有1种) 第三类：It is... that从句.(有5种)
it 作形式主语
第一类：It is ...to do. (有2种)。
1. It is/was +形容词+(for/of sb.)+to do sth. 用for 还是of的规则：如果形容词是描述事物的， 如difficult, easy, hard, important, dangerous等用for; 如果描述的是人物的性格、品质，如good, nice, clever等则用of.
It is said that he is a thief.
= He is said to be a thief.
It is reported that jack has been taken away by aliens.
= Jack is reported to have been taken away by aliens.
6. it + be + v.-ed+ that从句.
“据… / 有人（人们）…” It is reported that many people died in the
earthquake.
It is suggested that the students (should) build up their strength.
I would appreciate it if I were admitted to the school football team. I hate it that you speak when your mouth full.
Don’t take it for granted that famous brands mean high quality.
IV. 用在特定句型中
IV. It 用在特定习语中
it 充当形式主语，构成大量的常用句式。要注 意it后谓语不同的形式，并译成通顺的汉语。
1. It is a fact that... 事实是…… It is a wonder that... 这真是个奇迹 It is no wonder that... 难怪……
I think it no use arguing with him. I found it very interesting to study English. He made it clear that smoking is banned in the school. He considers it his duty to help those at risk.
It is strange that he shouldn’t feel ashamed of his behavior.
（当adj.为strange/surprising /natural/ important/necessary等时，that 从句中即 (should ) + do）.
5. it + be + n. + that从句.
eg. My pen is missing. I can’t find it.
Xi’an is a beautiful city, isn’t it? Is this your dog？No, it isn’t. 2. 指代性别不明的人（常指baby）/ 说话人不 清楚性别的人（常在打电话、敲门等时）:
其中，当v.为insist; command,order; suggest, recommend; require, request, demand(一 坚持，二命令，三建议，四要求)等时，that 从 句中的v.用虚拟语气，即( should ) + do。
It is/was + 动词的过去分词+ that-clause
eg. The baby cried because it was hungry.
There is a knock at the door. It must be Jack.
3.“it”表示天气、时间、日期、距离、价值、度量、
温度、环境，季节，情况等（称为非人称的it）：
It is a bit windy. （指天气）
7. it + vi.+ that从句.
( 常用的vi.有happen, seem, appear, looks, 等.)
It seems/ appears/ happens/ occurs +that-clause
eg. It seems that he will be back in a few days.
(指环境)
It is half an hour’s walk to the city centre. (指距离) How is it going? (指情形)
II.“It”用作“形式主语” （分三类，共8种情况。）
It 代替动词不定式、动名词短语、名词性从句 做主语，这是一种习惯表达，避免头重脚轻。
it + be + adj. (+ for sb.）+ to do sth.
（ 此处adj. 通常为描述“事物”的形容词：
It is important for us to learn English well.
e.g. It is important (_f_o__r_ us) to keep the water clean.
It was nearly midnight when she came ba（ck指. 时间） IItt'issA1p5r0ily9u,a2n0. 20（. 指（价指格日）期）
It is summer now. (指季lograms.
（指度量）
It was very quiet in the café.
stTudhyeharud.se of “it”
it 真实身份大揭底
• Ⅰ. 用作代词 • Ⅱ. It用作形式主语 • III. It 作形式宾语 • IV. It 用在特定句型中 • V. It 用在固定习语中
• (提示：IV.和V为总结，可以选用)
I. “It”用作代词
Ⅰ.用作代词
1. It 指代事物或上文中提到的事物。（简化语 言，避免重复）
2. It is obvious that... 很明显……，很清楚… It is strange that... 奇怪的是……，……令人 费解
It is very kind (__o_f__ you) to say so.
It is hard ( for me) to understand it.
2. it + be + n. + to do sth.
“做某事（真）是个…” 常用n.有：good idea / a pity/ a shame等 e.g. It is a good habbit to get up early.
It happened that he met his teacher in the street.
It doesn’t matter whether you will come or not.
e.g. It appears that she is a good teacher. = She appears to be a good teacher.
It is a pity to hear that.
It will be great fun to visit Great Wall.
第二类：It is... doing. (有1种) 3. it + be + n./ adj. + doing sth.
It’s no use/useless doing sth 做某事是无用的
It is no wonder that you are breathless.
It is a pity /shame that he should get into the habit of abusing alcohol.
（其中，当n.为a pity (a shame /an honor /a surprise... 等表示出乎意料时，常译为“竟然”， that 从句中的v.用虚拟语气，即should + do） 。 没有这种意义时，则不用虚拟语气。 eg. It is a pity that you miss the opportunity.
The use of “it”
“it” is a pronoun. 既是主格也是宾格。 故 it 既可以作主语也可以作宾语。
作主语和宾语： It is a cat. I like it. It's April 9, 2020 It is certain that I will go there. I feel it necessary that we should
It’s no good/ a waste of time/fun/worth doing sth
eg . It's no use crying over spilt milk. It's useless thinking too much.
It's a waste of time playing computer games. It’s worth visting.
2. 某些谓v.+ it 形宾+ 真宾（that/when/if 从句） （常用v. 用：like, love, appreciate; dislike, hate ,depend on , count on; see to , make sure; take…for granted等。） eg.I don’t like it when one speaks with his mouthful. You can depend on it that he will come here on time.
教他们英语要有很多耐心。
III. “It”用作“形式 宾语”
（共2种情况）
III. “It”用作“形式宾语” 1. “某些v. + it (宾语) + （n.\adj.）宾补 +
to do \doing\that从句(真宾)”
常用的v.有: think, believe, make, find, consider, feel, etc.
It is said that.. It is reported that.. It is believed that… It is told that… It is known that… It is thought that… It is suggested that.. …
据说 据报道 据认为 据说 据知道 据认为/想 据建议
就看 I am+ 形容词通不通顺，不通顺就用for, 通顺就 用of.
it + be + adj. + of sb.+ to do sth.
“（对 sb.来说，）做某事是…的。”
（ 此处adj. 通常为描述“人”的形容词： It's kind of you to help me with the problem. It’s generous of you to donate such a large of money to charity.
= We seem to have made a mistake.
8. It vt+ 宾语+
that-clause to do sth.
It requires a lot of patience that we teach them English. It requires a lot of patience to teach them English
第三类：It is... that从句.(有4种) 4. It + be + adj. + that从句.
It is very clear that he’s round and tall like a tree.
It is certain that everything will get on well due to our hard work.
第一类：It is ...to do. (有2种)。 第二类：It is... doing. (有1种) 第三类：It is... that从句.(有5种)
it 作形式主语
第一类：It is ...to do. (有2种)。
1. It is/was +形容词+(for/of sb.)+to do sth. 用for 还是of的规则：如果形容词是描述事物的， 如difficult, easy, hard, important, dangerous等用for; 如果描述的是人物的性格、品质，如good, nice, clever等则用of.
It is said that he is a thief.
= He is said to be a thief.
It is reported that jack has been taken away by aliens.
= Jack is reported to have been taken away by aliens.
6. it + be + v.-ed+ that从句.
“据… / 有人（人们）…” It is reported that many people died in the
earthquake.
It is suggested that the students (should) build up their strength.
I would appreciate it if I were admitted to the school football team. I hate it that you speak when your mouth full.
Don’t take it for granted that famous brands mean high quality.
IV. 用在特定句型中
IV. It 用在特定习语中
it 充当形式主语，构成大量的常用句式。要注 意it后谓语不同的形式，并译成通顺的汉语。
1. It is a fact that... 事实是…… It is a wonder that... 这真是个奇迹 It is no wonder that... 难怪……
I think it no use arguing with him. I found it very interesting to study English. He made it clear that smoking is banned in the school. He considers it his duty to help those at risk.
It is strange that he shouldn’t feel ashamed of his behavior.
（当adj.为strange/surprising /natural/ important/necessary等时，that 从句中即 (should ) + do）.
5. it + be + n. + that从句.
eg. My pen is missing. I can’t find it.
Xi’an is a beautiful city, isn’t it? Is this your dog？No, it isn’t. 2. 指代性别不明的人（常指baby）/ 说话人不 清楚性别的人（常在打电话、敲门等时）:
其中，当v.为insist; command,order; suggest, recommend; require, request, demand(一 坚持，二命令，三建议，四要求)等时，that 从 句中的v.用虚拟语气，即( should ) + do。
It is/was + 动词的过去分词+ that-clause
eg. The baby cried because it was hungry.
There is a knock at the door. It must be Jack.
3.“it”表示天气、时间、日期、距离、价值、度量、
温度、环境，季节，情况等（称为非人称的it）：
It is a bit windy. （指天气）
7. it + vi.+ that从句.
( 常用的vi.有happen, seem, appear, looks, 等.)
It seems/ appears/ happens/ occurs +that-clause
eg. It seems that he will be back in a few days.
(指环境)
It is half an hour’s walk to the city centre. (指距离) How is it going? (指情形)
II.“It”用作“形式主语” （分三类，共8种情况。）
It 代替动词不定式、动名词短语、名词性从句 做主语，这是一种习惯表达，避免头重脚轻。
it + be + adj. (+ for sb.）+ to do sth.
（ 此处adj. 通常为描述“事物”的形容词：
It is important for us to learn English well.
e.g. It is important (_f_o__r_ us) to keep the water clean.
It was nearly midnight when she came ba（ck指. 时间） IItt'issA1p5r0ily9u,a2n0. 20（. 指（价指格日）期）
It is summer now. (指季lograms.
（指度量）
It was very quiet in the café.
stTudhyeharud.se of “it”
it 真实身份大揭底
• Ⅰ. 用作代词 • Ⅱ. It用作形式主语 • III. It 作形式宾语 • IV. It 用在特定句型中 • V. It 用在固定习语中
• (提示：IV.和V为总结，可以选用)
I. “It”用作代词
Ⅰ.用作代词
1. It 指代事物或上文中提到的事物。（简化语 言，避免重复）
2. It is obvious that... 很明显……，很清楚… It is strange that... 奇怪的是……，……令人 费解
It is very kind (__o_f__ you) to say so.
It is hard ( for me) to understand it.
2. it + be + n. + to do sth.
“做某事（真）是个…” 常用n.有：good idea / a pity/ a shame等 e.g. It is a good habbit to get up early.
It happened that he met his teacher in the street.
It doesn’t matter whether you will come or not.
e.g. It appears that she is a good teacher. = She appears to be a good teacher.
It is a pity to hear that.
It will be great fun to visit Great Wall.
第二类：It is... doing. (有1种) 3. it + be + n./ adj. + doing sth.
It’s no use/useless doing sth 做某事是无用的
It is no wonder that you are breathless.
It is a pity /shame that he should get into the habit of abusing alcohol.
（其中，当n.为a pity (a shame /an honor /a surprise... 等表示出乎意料时，常译为“竟然”， that 从句中的v.用虚拟语气，即should + do） 。 没有这种意义时，则不用虚拟语气。 eg. It is a pity that you miss the opportunity.
The use of “it”
“it” is a pronoun. 既是主格也是宾格。 故 it 既可以作主语也可以作宾语。
作主语和宾语： It is a cat. I like it. It's April 9, 2020 It is certain that I will go there. I feel it necessary that we should
It’s no good/ a waste of time/fun/worth doing sth
eg . It's no use crying over spilt milk. It's useless thinking too much.
It's a waste of time playing computer games. It’s worth visting.
2. 某些谓v.+ it 形宾+ 真宾（that/when/if 从句） （常用v. 用：like, love, appreciate; dislike, hate ,depend on , count on; see to , make sure; take…for granted等。） eg.I don’t like it when one speaks with his mouthful. You can depend on it that he will come here on time.
教他们英语要有很多耐心。
III. “It”用作“形式 宾语”
（共2种情况）
III. “It”用作“形式宾语” 1. “某些v. + it (宾语) + （n.\adj.）宾补 +
to do \doing\that从句(真宾)”
常用的v.有: think, believe, make, find, consider, feel, etc.
It is said that.. It is reported that.. It is believed that… It is told that… It is known that… It is thought that… It is suggested that.. …
据说 据报道 据认为 据说 据知道 据认为/想 据建议
就看 I am+ 形容词通不通顺，不通顺就用for, 通顺就 用of.
it + be + adj. + of sb.+ to do sth.
“（对 sb.来说，）做某事是…的。”
（ 此处adj. 通常为描述“人”的形容词： It's kind of you to help me with the problem. It’s generous of you to donate such a large of money to charity.