[高中英语条件状语从句的句型]if引导的条件状语从句

1、 高中英语条件状语从句的句型 if 引导的条件状语从句【导语】 在高中英语的学习中， 学生会学习到很多的重要的句型，F面大将为大家带来条件状语的句型的介绍，希望能够帮助到大家。1 条件状语从句句型 1When / So long as / As long as / Once + 从句，+主句。（ 从句也可以放在主句之后。 ） 如：As long as you give me any money, I will let you go.只要你给我一些钱，我就让你走。Once you have begun to learn English, you should learn it well. 一旦你

2、开始学习英语，你应该把它学好。句型 2主句 +on condition that+ 从句 . 如：I will go with you on condition that you give me a sum of money.我和你一起去的条件是你给我一些钱。句型 3主句 +unless+ 从句 .（ 注意： 由于 unless 本身是否定词， 所引导 的从句的谓语动词用肯定而不用否定。 ） 如：I will go there tomorrow unless it rains.我明天去那儿除非下雨。点击查看：高中英语语法大全句型 4祈使句， +and/ and then+ 主句。 （注意：祈使

3、句也可用一个名词短语。 ） 如：Use your head, and you will find a good idea.动脑筋想一想，你就会想出一个好主意。Another word, and I will beat you. 你再说一句，我就揍你。句型 5If +necessary / impossible/ important等，+主句.（ 注意：if 与形容词之间的 it is 被省略。 ）如：If necessary, I will do it. 如果有必要的话，我来做此事。2 原因状语从句句型 1主句 +in case+ 从句 .（in case 表示以免 ）如：I will tak

4、e my raincoat in case it rains.我要把雨衣带上以免下雨。句型 2主句 +due to / because of / owning to / + the fact that + 从句。如：He did not e to school because of the fact that he was ill.由于他有病了，所以没有来上学。高中英语句型 1It (so) happened(chanced) that +clause. = sb. happened/chanced to do sth. =sb.did sth. by chance.如：It happened

5、 that he was out when I got there. 当我到那儿时，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 2It seems that sb. do/ be doing/ have done/ had done= Sb.seemsto do/ be doing/ have done/to be done/to have been done(还 有动词

6、 appear 等可这样使用 ) 如 :It seemed that he had been to Bei _g before.他好象以前去过北京。 =He seemed to have been to Bei _g before.句型 3It is / was+ 被强调的部分+that（who）+ 剩余的部分. 如：It wasn t until he came back that I went to bed. 直到他 回来我才睡觉。 （ 一定要注意被强调句型中的谓语动词否定的转移 ） 。It was because he was ill that he didn t e to school

7、 today. 只因为他有病了今天没有来上学。（只能用because而不能用for, as 或 since）It is I who am a student.我确实是个学生。（句中am不能用 are 来代替。 ）句型 4It is high time （time/ about time）+ （that） 主语 +should do / did+ 其它。（从句中的谓语动词用的是虚拟语气。）如:我们该回It is high time that we should go / went home.家了。句型 5It is / was said ( reported)+that+ 从句. 如：It wa

8、s said that he had read this novel.据说他读过这篇小说。 =He was said to have read this novel.句型 6It is impossible / necessary/ strangethat clause.( 从句中的谓语用should+do / should have done,其形式是虚拟语气。) 如：It is strange that he should have failed in this exam.真奇怪，他这次没有及格。句型 7It is + a pity/ a shamethat clause.（注意从句中的谓

9、语动词用 should do 或 should have done 的形式， 但 should 可以省略。 ）如：He didn t e back until the film ended. It was a pity that he should have missed this film. 他直到电影结束才回来。他没有看到这部电影真可惜。句型 8It is suggested / ordered/ manded /that +clause.（ 从句的谓语动词用 should do, 但 should 可以省略。 ） 如：It is suggested that the meeting sh

10、ould be put off.有人建议推迟会议。句型 9It is/was+表示地点的名词+where+从句。（注意本句不是强调 句型，而是以 where 引导的定语从句。 ）如：It was this house where I was born. 请比较： It was in thishouse that I was born.（ 后一句是强调句型。 ）句型 10It is / was +表示时间的名词+when+A句。（注意本句型也不是强调句型，而是以when引导的定语从句。）如：It was 1999 when he came back from the United States.

11、请比较： It was in 1999 that he came back from the United States.句型 11It is well-known that+ 从句。如：It is well-known that she is a learned woman.众所周知，她是个渊博的妇女。句型 12It is +段时间 +since+ 主语 +did. 请比较：It was + 段时间 +since+ 主语 +had done. 如：It is five years since he left here.他已经离开这儿五年了。It was five years since he

12、 left here.（ 同上 ）注意下列句型的翻译:It is five years since he lived here.他从这儿搬走已经有五年了。句型 13It + 谓语 +段时间 +before+ 主语 +谓语 .（ before 引导的是时间 状语从句。 ） 如：Itwasn t long before the people in that country rose up.没有多久那个国家的人民就起义了。It will be three hours before he es back. 三个小时之后他 才能回来。句型 14It is +形容词 （possible, impossible, necessary 等 ） +for+sb.+ to do. 如：It is impossible for meto finish this work before tomorrow. 我明天之前完成此工