[高中]全新語法:主語從句 二、it作形式主語

二、it作形式主語

1.that引導(dǎo)的主語從句

（1）It+be+名詞+that

It is a good thing that ……是好事情　　　　It is a fact that 事實(shí)是……

It is a pity/a shame that 真遺憾……　　　　It is a surprise that 令人驚奇的是……

It is a question that ……是個(gè)問題　　　　　It is common knowledge that ……是常識

It is good news that ……是好事情　　　　　 It is one’s belief that 某人認(rèn)為……

It’s a pity that he didn’t come.很遺憾他沒來。

It is a mystery how he is going to do it.他打算如何做是個(gè)謎。

（2）It+be+形容詞+that

It is certain that 肯定……　　　　　　　　It is important that 重要的是……

It is impossible that 不可能……　　　　　 It is likely that 很可能……

It is obvious/clear that 很明顯……　　　　It is surprising that 令人驚訝的是……

It is natural that ……那是自然的　　　　　It is necessary that 有必要……

It is possible that 很可能……　　　　　　 It is strange that 很奇怪……

It is possible that he has stolen the car.很可能他偷了小汽車。

It is certain that he will leave for Beijing tomorrow.明天他肯定要去北京。

It is quite clear that he has read the book.很顯然，他讀過這本書。

（3）It+be+過去分詞+that

It is agreed that 大家同意……　　　　　　It is argued that 大家爭論……

It is assumed that 假定……　　　　　　　 It is believed that 大家相信……

It has been decide that 大家決定……　　　It is hoped that 大家希望……

It is （well）known that 家喻戶曉……　　 It is reported that 據(jù)報(bào)道……

It is recommended that 據(jù)推薦……　　　　 It is rumored that 謠傳……

It is said that 據(jù)說……　　　　　　　　　It is suggested that 有人建議……

It is supposed that 大家推測……　　　　　It is thought that 大家認(rèn)為……

It must be remembered that 務(wù)必記住……

It is taken for granted that ……被視為當(dāng)然

It’s decided that the meeting will start at 8 in the morning.定于明天上午八點(diǎn)開會。

It is suggested that you （should）spend more time in studying English.

你應(yīng)該花更多的時(shí)間學(xué)習(xí)英語。

【提示】 在以上三種句式中，主語從句用來表示驚奇、不相信、惋惜、理應(yīng)如此等語氣時(shí)，謂語動詞要用虛擬語氣“should+動詞原形”，should可以省略。

（4）It+不及物動詞+that

It appears that 好像是……　　　　　　　　　It happens that 碰巧是……

It occurs to sb.that ...某人突然想起……　　It seems that 好像是……

It strikes sb.most that 令某人印象深刻的是……

It turns out that 結(jié)果是……

It happened that I had no money on me.碰巧我身上沒帶錢。

It seems that your plan is more practical.你的計(jì)劃似乎更切實(shí)可行。

It appears that everybody is here.Let’s start.看來大家都到了，咱們開始吧。

It turns out that our team has won the game.結(jié)果是我們隊(duì)贏了這場比賽。

It really matters that you haven’t turned up.你沒來，這的確很有影響。

It occurred to me that we should get in touch with the manager.

我突然想起我們應(yīng)該與經(jīng)理聯(lián)系。

2.whether引導(dǎo)的主語從句

It makes little difference whether we go or stay.我們?nèi)ミ€是留沒有多大差別。

It’s not yet settled whether I am going to America.我去不去美國還沒定。

It was a problem whether they would support us.他們是否會支持我們還是一個(gè)問題。

3.連接代詞和連接副詞引導(dǎo)的主語從句

It is unknown who has broken the glass.誰打破了玻璃現(xiàn)在還不知道。

It is being investigated what he did last night.他昨天晚上干了些什么正在調(diào)查之中。

It is unknown when he was born.他生于何時(shí)還不知道。