1. it is +序数词/最高级+time that………从句中用现在完成时)
it was +序数词/最高级+ time that………从句中用过去完成时)
it’s (high) time that…….从句中用过去时或should do)
2. it’s the same with sb. /so it is with sb.表示某人也如此（用于前句中既有肯定又有否定或两个不同类的谓语动词）
3.…be about to do / be doing……when…….正要做/正在做……就在那时…….
4 a is twice / three times as +原级+as b
a is twice / three times the n. of b.
a is twice / three times +比较级+than b
5. it’s no use / good doing………
6. there’s no use / good doing…….
there’s no sense / point (in) doing……
there is (no) possibility that………同位语从句）
比较级…….the+比较级………越…….越…….
8. .it is said / thought / believed / hoped / supposed ……that sb………
sb. is said to be / to do / to be doing / to h**e done……
9. …so…….that…….如此…….以致于…..
…such….that…. 像…….的这个……
…….such…….as……像…….的这种……
10. the chance is that…….the )chances are that………很可能…….
11. depend on it that…….取决于
see to it that…….负责/设法做到…….
12． it is / was +.that/who………
how / when / where / why is / was it that………
13 .how is it that…….这几个句型都表示“怎么会…….怎么发生的？”）
how come+从句？
how does / did sth. come about? (how did it come about that…….
如：how come you are late again?
14. there seems / appears / happens to be / must be / can’t be / is (are, was, were) said to be / is (are, was, were) thought to be…….表示 “.
似乎有/碰巧有/一定有/不可能有/ 据说有/认为有…….
介词（如of ）there being
want / wish / expect there to be要/希望/期待有。
如：i h**e never dreamed of there being such a good chance for me.
i h**e never expected there to be such a good chance for me.
15. 疑问词+插入语+陈述语序？
who do you think he’ll h**e attend the meeting?
16. it won(’t) be long before +从句（从句中用一般现在时）不久/很久就要…….
it was (not) long before+从句（从句中用一般过去时）不久/很久才…….
17. those who………从句及主句中谓语动词用复数形式).
anyone who………whoever………从句及主句中谓语动词用单数形式)
18…….主句（一般现在时或过去时）….when从句….
(might / should do 或might / should h**e done) 表示”对比”,意思为 “本该……(可)而却”,主句中为陈述语气，从句里为虚拟语气，如：why are you here when you should be in school?你本该上学的怎么在这儿？
he stopped trying when he might h**e succeeded .本该已成功了他却停止努力了。
19. there is ./sb. h**e no doubt that………
there is / sb. h**e some doubt whether…….
there was a time when…….曾经有那么一度………
there is much chance that...
20 immediately / instantly /the instant / the moment +从句。
on / upon + n. /doing
no sooner had sb. done than ……过去时)
hardly had sb. done when…….过去时)
shortly/ sb. done...after...过去时)
21. every time / each time / the last time / the first time / next time +从句（名词性短语引导一个时间状语句）
anywhere / everywhere +从句（相当于wherever引导的地点状语从句）
如：you can go anywhere you like.
next time you come, please bring your son along.
22 .considering / seeing that………考虑到/鉴于…….
given + 句子，表示 “在有……的情况下” “如果有” ,也表示”考虑到”
suppose/supposing“假定”
provided thaton condition that...条件是。
如：seeing (that) he refused to help us, there is no reason why we should help him now.
given good health, i hope to finish the work this year.
given their inexperience / that they are inexperienced, they’ve done a good job.
than与 none连用，表示肯定意思，如：it was none other than mr. smith.这正是smith先生。
24. not until…….did / do/ does / will sb. do……
it was / is not until ……that sb………
25. it remains to be seen wh--words ……是否…….还有待于看。(不用that, if作连接词)
.it only remains for sb. to do……剩下的只是要某人做某事。
如：we’ve got everything ready. it only remains for you to come to dinner.
moment…….and now………刚才一会儿还在做……而现在却…….
all / both / everyone………表示部分否定。
28. i like / hate / appreciate it that / when等从句 (it代指后面从句的这种情况)
i appreciate it if you will give me a hand.
29. by the time +从句（一般现在时/过去时），主句（将来完成时/过去完成时）
30………as is often the case with sb. /as is usual with sb.(as引导非限制性定语从句)
置于句首可表示as long as 或 although
如：while there is life there is hope.
while i admit his good points, i can see his bad ones.
32. too...to...太。而不能。
否定词+too...to越……越好”“非常”
too + adj. (anxious / eager / willing / ready / glad等)+to do….表示肯定意思。
如：he is never too careful to drive.
he was too glad to see his father.=he was very glad to see his father.
33. not / never等表示否定的词与比较级连用表示最高级，如：--do you agree with his suggestion?
---i can’t agree more.
34. 序数词+最高级。
如：the yellow river is the second longest river in china.
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