2016年職稱英語備考：以形式主語it引導(dǎo)的句型
句型1.
It (so) happened（chanced) that +clause.=sb. happened /chanced to do sth. =sb.did sth. by chance. 如：
It happened that he was out when I got there. 當(dāng)我到那兒時(shí)，碰巧他不在。＝He happened to be out when I got there.= It chanced that he was out when I got there= He was out by chance when I got there.
句型2.
It seems that sb. do/be doing/have done/had done= Sb. seems to do/be doing/have done/to be done/to have been done（還有動(dòng)詞appear等可這樣使用)如:
It seemed that he had been to Beijing before.他好象以前去過北京。＝He seemed to have been to Beijing before.
句型3.
It is /was＋被強(qiáng)調(diào)的部分＋that(who)+剩余的部分.如：
It wasn't until he came back that I went to bed.直到他回來我才睡覺。(一定要注意被強(qiáng)調(diào)句型中的謂語動(dòng)詞否定的轉(zhuǎn)移)。 It was because he was ill that he didn't come to school today.只因?yàn)樗胁×私裉鞗]有來上學(xué)。（只能用because而不能用for,as 或since)
It is I who am a student. 我確實(shí)是個(gè)學(xué)生。（句中am不能用are來代替。)
句型4.
It is high time (time/about time)+ (that) 主語＋should do /did+其它。（從句中的謂語動(dòng)詞用的是虛擬語氣。)如:
It is high time that we should go /went home.我們?cè)摶丶伊恕?/P>
句型5.
It is /was said ( reported…)＋that+從句. 如：
It was said that he had read this novel.據(jù)說他讀過這篇小說。＝He was said to have read this novel.
句型6.
It is impossible /necessary/strange…that clause.(從句中的謂語用should＋do /should have done，其形式是虛擬語氣。)如：
It is strange that he should have failed in this exam.真奇怪，他這次考試沒有及格。
句型7.
It is + a pity/a shame…that clause.(注意從句中的謂語動(dòng)詞用should do或should have done的形式，但should可以省略。)如：
He didn't come back until the film ended. It was a pity that he should have missed this film. 他直到電影結(jié)束才回來。他沒有看到這部電影真可惜。
句型8.
It is suggested /ordered/commanded /…that +clause.(從句的謂語動(dòng)詞用should do,但should可以省略。)如：
It is suggested that the meeting should be put off.有人建議推遲會(huì)議。
句型9.
It is/was＋表示地點(diǎn)的名詞＋where+從句。（注意本句不是強(qiáng)調(diào)句型，而是以where引導(dǎo)的定語從句。)如：
It was this house where I was born.請(qǐng)比較：It was in this house that I was born.(后一句是強(qiáng)調(diào)句型。)
句型10.
It is /was +表示時(shí)間的名詞＋when+從句。（注意本句型也不是強(qiáng)調(diào)句型，而是以when引導(dǎo)的定語從句。)如：
It was 1999 when he came back from the United States. 請(qǐng)比較：It was in 1999 that he came back from the United States.
句型11.
It is well-known that＋從句。如：
It is well-known that she is a learned woman.眾所周知，她是個(gè)知識(shí)淵博的婦女。
句型12.
It is +段時(shí)間＋since+主語＋did. 請(qǐng)比較：
It was +段時(shí)間＋since+主語＋had done. 如：
It is five years since he left here.他已經(jīng)離開這兒五年了。
It was five years since he left here.（同上)
注意下列句型的翻譯:It is five years since he lived here.他從這兒搬走已經(jīng)有五年了。
句型13.
It +謂語＋段時(shí)間＋before+主語＋謂語.（ before引導(dǎo)的是時(shí)間狀語從句。) 如：
It wasn't long before the people in that country rose up.沒有多久那個(gè)國家的人民就起義了。
It will be three hours before he comes back.三個(gè)小時(shí)之后他才能回來。
句型14.
It is +形容詞(possible,impossible,necessary等) ＋for+ sb.+ to do. 如：
It is impossible for me to finish this work before tomorrow.我明天之前完成此工作是不可能的。
句型15.
It is +（心理品質(zhì)方面的)形容詞＋of + sb. +to do.= 主語+ be +形容詞＋to do.(常用的形容詞有：kind,stupid;foolish,good,wise等。)如：
It is kind of you to help me.＝Y(jié)ou are kind to help me.你真好給我提供了幫助。
