第1个回答 2022-05-26
It 用作形式宾语
当不定式（短语）、动名词（短语）或从句在某个句子中作宾语时,为保持句子结构平衡,避免句式结构的混乱,常用it作形式宾语,而将真正的宾语放在句尾.此时it仍只起先行引导作用,本身无词义.
下列四种情况须用it 作形式宾语：
① 当不定式（短语）、动名词（短语）或从句在复合宾语结构中作某些动词的宾语时（如think,make,find,consider,feel,suppose等）；
e.g.They found it pleasant that they worked with us Chinese.
（他们发现与我们中国人一起工作很愉快.）
I don’t feel it difficult to understand the Special English.
（我觉得理解英语特别节目并不难.）
He makes it a rule never to borrow money.
（他立志决不向别人借钱.）
I think it no need talking about it with them.
（我认为没必要跟他们谈.）
② 某些表示“喜、怒、哀、乐”的动词,如like,enjoy,love,hate等,往往不能直接接宾语从句；
e.g.I don’t like it that he’s so lazy.
（我不喜欢他那么懒惰.）
I hate it when my mother asks me to eat eggs.
（我讨厌母亲要我吃鸡蛋.）
③ that引导的宾语从句不能直接作介词的宾语；
e.g.You may depend on it that we shall always help you.
（尽管放心,我们会随时帮你的.）
Would you see to it that she gets home early?
（你负责保证她早到家,好吗?）
He insisted on it that he was innocent.
（他坚持说自己是无辜的.）
④ 由及物动词与介词组成的固定搭配中,宾语从句若作该动词的宾语时,须借用it.
e.g.I leave it to your own judgment whether you should do it.
（我让你自己判断这事是否该做.）
We owe it to you that there wasn’t a serious accident.
（多亏了你才没有发生严重事故.）
“it”作形式宾语时的几种特殊结构
英语中,当动词不定式、动名词或从句在句中充当宾语且其后又带有宾语补足语时,习惯上要在宾语补足语前使用一个没有具体意义的形式宾语it,而将真正的宾语移到补足语的后面,构成“动词＋it＋宾语补足语＋不定式（动名词或从句）”结构.如：She felt it her duty to take good care of them.
她感到好好照顾他们是她的责任.
I think it no good going there now.
我认为现在去那里没有好处.
The headmaster has made it clear that the school meeting will not be put off.
校长说得很清楚校会不会推迟.
但我们常会碰到it用作形式宾语时之后没有形容词或名词作宾语补足语的情况,这一点在近几年高考试题中经常涉及,需引起同学们的注意.
I hate_____ when people talk with their mouths full.(NMET 1998)
A.it B.that C.these D.them (答案为:A)
我讨厌人们一边吃饭一边说话.
I like _____ in the autumn when the weather is clear and bright.(全国卷 2004)
A.this B.that C.it D.one (答案为:C)
我喜欢秋天晴朗的天气.
以上这两道高考题中,it用作形式宾语,它的真正的宾语则是由when引导的从句.“it”的这种特殊用法常出现在以下几种结构中.
A.动词＋it＋when / if 从句.常见于appreciate,enjoy,like,dislike,love,hate,prefer等少数动词之后.
We would much appreciate it if you could do us that favour.
要是你们能帮我们这个忙,我们将非常感激.
I'd prefer it if I didn't have to finish the work.
要是我不必完成那项工作,那就太好了.
B.动词+ it + that从句.常见于like,take,have,put等少数动词之后（it相当于that从句的同位语）.
I take it that they will succeed sooner or later.
我认为他们迟早会成功的.
The newspapers have it that some Japanese firms have gone bankrupt.
报上说一些日本商号破产了.