大师作文网英语中it有哪些用法?
来源：学生作业帮 编辑：大师作文网作业帮 分类：英语作业 时间：2024/11/18 09:17:05
英语中it有哪些用法?
一、作人称代词,可用来代替人、物或事.
—Who is knocking at the door?—It's me
The ant is not gathering this food for itself alone.Ithas two stomachs in its body.蚂蚁不 只是为自己采食.它的身体里有两个胃.
When service is interrupted,as it was by last night'sstorm,John has to inform the pu blic what the company isdoing about the problem.每当供电中断时,就像昨夜因暴风雨而造成的那样 ,约翰就必须通知大家,公司为解决这个问题正在做些什么.
二、作非人称代词,表示时间、天气、季节、距离、环境等.
It is tea time.Mrs Tuner goes into the kitchen.It was winter.it was ten degree below zero.
It is only half an hour walk to the tall tower.
It will be lovely in the park today.
三、作先行词.
1.作形式主语.英语中不定式、动名词、主语从句在作主语时主语往往显得很长,使整个句子看上去有点 头重脚轻,这样就借助“it”来作形式上的主语,而把真正的主语移到句子后边去,使全句看上去平稳一些.“it”没有实际的意义.
It is fun for her to study,but it is difficult to studyand work at the same time.对于她来 说学习是有趣的,可是要边工作边学习对她来说是困难的.
It is necessary for them to get an electrician to do thework for them.对他们来说请一位电工 来为他们做这项工作是必要的.
It will be no good learning without practice.
It is no use talking to him about it.
It is possible that they're finished the bridge..
It is important that we should learn from each other andhelp each other.
2.作形式宾语.这种情况通常只用于能带以名词或形容词作宾语补语的动词后面.
In the 1870's,when Marx was already in his fifties,hefound it important to study the si tuation in Russia,so hebegan to learn Russian.在19世纪70年代,马克思已经五十几岁了,他觉得研 究俄国的形势很重要,便开始学习俄语.
This has made it necessary for agriculture and industryto develop very quickly.这就使得工 农业必须飞速发展.
四、构成强调句型.为了强调句子的某一成分,把引导词“it”用在句首,这种强调句的结构是“It is （was ）＋所强调的成分（主语、宾语、状语）＋that…”,表达的意思为“是…,正是…,就是…”.“it ”在这种句型中本身没什么实际意义.
My temperature!It's my back that hurts.
It is not only blind men who make such stupid mistakes.这里需要说明的是：如被强调的是人,则后面用who或that,如被强调的是物或其他情况,则用that.
It was yesterday that I met Bob in your room.
It was in your room that I met Bob yesterday.
It was Bob that I met in your room yesterday.
—Who is knocking at the door?—It's me
The ant is not gathering this food for itself alone.Ithas two stomachs in its body.蚂蚁不 只是为自己采食.它的身体里有两个胃.
When service is interrupted,as it was by last night'sstorm,John has to inform the pu blic what the company isdoing about the problem.每当供电中断时,就像昨夜因暴风雨而造成的那样 ,约翰就必须通知大家,公司为解决这个问题正在做些什么.
二、作非人称代词,表示时间、天气、季节、距离、环境等.
It is tea time.Mrs Tuner goes into the kitchen.It was winter.it was ten degree below zero.
It is only half an hour walk to the tall tower.
It will be lovely in the park today.
三、作先行词.
1.作形式主语.英语中不定式、动名词、主语从句在作主语时主语往往显得很长,使整个句子看上去有点 头重脚轻,这样就借助“it”来作形式上的主语,而把真正的主语移到句子后边去,使全句看上去平稳一些.“it”没有实际的意义.
It is fun for her to study,but it is difficult to studyand work at the same time.对于她来 说学习是有趣的,可是要边工作边学习对她来说是困难的.
It is necessary for them to get an electrician to do thework for them.对他们来说请一位电工 来为他们做这项工作是必要的.
It will be no good learning without practice.
It is no use talking to him about it.
It is possible that they're finished the bridge..
It is important that we should learn from each other andhelp each other.
2.作形式宾语.这种情况通常只用于能带以名词或形容词作宾语补语的动词后面.
In the 1870's,when Marx was already in his fifties,hefound it important to study the si tuation in Russia,so hebegan to learn Russian.在19世纪70年代,马克思已经五十几岁了,他觉得研 究俄国的形势很重要,便开始学习俄语.
This has made it necessary for agriculture and industryto develop very quickly.这就使得工 农业必须飞速发展.
四、构成强调句型.为了强调句子的某一成分,把引导词“it”用在句首,这种强调句的结构是“It is （was ）＋所强调的成分（主语、宾语、状语）＋that…”,表达的意思为“是…,正是…,就是…”.“it ”在这种句型中本身没什么实际意义.
My temperature!It's my back that hurts.
It is not only blind men who make such stupid mistakes.这里需要说明的是：如被强调的是人,则后面用who或that,如被强调的是物或其他情况,则用that.
It was yesterday that I met Bob in your room.
It was in your room that I met Bob yesterday.
It was Bob that I met in your room yesterday.