一、以形式主语it引导的句型。
(so) happened（chanced） that +clause. 碰巧…
sb. happened /chanced to do sth. =sb. did sth. by chance.
it happened 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.
2. it seems/appears that sb. do/ be doing/ h**e done/ had done似乎…, 好像…
sb. seems/appear to do/ be doing/ h**e done/to be done/to h**e been done
it seemed that he had been to beijing before. 他好象以前去过北京。
he seemed to h**e been to beijing before.
3. it is / was＋被强调的部分＋that(who)+剩余的部分。
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 come to school 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）
4. it is/was＋表示地点时间/的名词＋where/when +从句。
注意本句不是强调句型，而是以where/when引导的定语从句。）
it was this house where i was born. 请比较：
it was in this house that i was born. (后一句是强调句型。)
it was 1999 when he came back from the united states.请比较：
it was in 1999 that he came back from the united states. (后一句是强调句型。)
5. it is / was said ( reported…)＋that+从句。 据说/报道…
it was said that he had read this novel.据说他读过这篇**。
he was said to h**e read this novel.
6. it is impossible / necessary/ strange…that clause.
从句中的谓语用should＋do / should h**e done，其形式是虚拟语气。)
it is strange that he should h**e failed in this exam. 真奇怪，他这次考试没及格。
7. it is + a pity/ a shame…that clause. (注意从句中的谓语动词用should do或。
should h**e done的形式，但should可以省略。)
he didn't come back until the film ended. it was a pity that he should h**e 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。
8. it is suggested / ordered/ commanded /…that +clause.
从句的谓语动词用should do, 但should可以省略。)
it is suggested that the meeting should be put off.有人建议推迟会议。
9. it is high time (time/ about time)+ that) 主语＋should do / did+其它。
是该做某事的时候了（从句中的谓语动词用的是虚拟语气。）
it is high time that we should go / went home.我们该回家了。
10. not only +特定动词＋主语＋谓语…but also+主语＋谓语…不但…而且。
not only did he learned english well but also he spoke french very well.
11. it is well-known that＋从句。众所周知。
it is well-known that she is a learned(知识渊博) woman.
12. it is +段时间＋since+主语＋did. /it was +段时间＋since+主语＋had done.
it is five years since he left here. 他已经离开这儿五年了。
it was five years since he had left here.（同上）
注意：it is five years since he lived here. 他从这儿搬走已经有五年了。
13. it +谓语＋段时间＋before+主语＋谓语。（ before引导的是时间状语从句。）
it wasn'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 comes back.. 三个小时之后他才能回来。
14. it is +形容词(possible, impossible, necessary等) ＋for+ sb.+ to do.
it is impossible for me to finish this work before tomorrow.
15. it is +（心理品质方面的）形容词＋of + sb. +to do.
主语+ be + adj. ＋to do. (常用的有kind, stupid; foolish, good, wise等。)
it is kind of you to help me. ＝you are kind to help me.
二、定语从句。
16. 由as引导的非限定性的定语从句
as we h**e known, he is a most good student.众所周知，他是个很好的学生。
请比较：it is well-known that he is a most good student.
前一个是定语从句，而后者是个主语从句。）
17. 由which引导的非限定性的定语从句。
he is a professor, which i h**e been looking forward to becoming.
他是个教授， 那是我一直盼望的职业。（因为先行词professor是表示职业的名。
词，因此引导词用which，而不用who。）
18. 由where, when引导的定语从句（其中包括限定性的或非限定性的。）
this is the house where i used to come. 请比较：
this is the house which / that i used to come to.
this is the day when i joined the party. 请比较：
this is the day which / that i joined the party on.
说明：关于that与which之间的区别，请看关系代词that和which的区别。）
三、让步状语从句。
19. no matter what / which / who / where / when / whose＋从句，＋主句。 无论…
注意从句中的时态一般情况下用一般现在时态。) 如：
no matter what you do, you must do it well. 请比较：
whatever you do, you must do it well. 无论你做什么，一定要做好。
no matter where you go, please let me know.请比较：
wherever you go, please let me know. 你无论去哪儿，请通知我。
说明：这两种句型形式不同，而意义完全相同。）
注意：i will tell whoever would like to read it. 句中的whoever不能用whomever
来代替。因为它即作动词tell的宾语，又作后面从句的主语。）
四、条件状语从句
20. so long as / as long as / once +从句，＋主句。（从句也可以放在主句之后。）
as long as you give me any money, i will let you go. 只要你……
once you h**e begun to learn english, you should learn it well. 一旦……
高中英语主要句型
1 so happened chanced that clause.sb.happened chanced to do sth.sth.by chance.2 it seems that sb.do be doing h e done had done sb.seems to do be doing...
高中英语主要句型练习
一 以形式主语it引导的句型。句型1.it so happened chanced that clause.sb.happened chanced to do sth.sth.by chance.如 当我到那儿时，碰巧他不在。句型2.it seems that sb.do be doing h e ...
高中英语重点句型
book 1 unit 1 重点句型book 1 unit 2 重点句型 1.状语从句的省略 while 分词结构 if 引导的让步状语从句。2.强调句 it is that1.特殊疑问词 do you think believe imagine guess 其他。was a time than 与...