30.There was a time when…….曾经有那么一度……….

28.If only / I　 wish +从句(用过去类时态) 表示虚拟语气, “要是…….就好了” “但愿……就好了!”

sidering + n. 或 pron. 或 that从句 / Seeing that……….考虑到/鉴于…….

Given + n. / pron作状语,表示 “在有……的情况下” “如果有” “假定”,有时也表示”考虑到”

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.

27.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从句)

anywhere / everywhere +从句(相当于wherever引导的地点状语从句)

You can go anywhere you like.

Next time you come, please bring your son along.

26. immediately / directly / instantly / 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)

注意：这几个结构都表示“一…….就”；

25. There is ./ Sb. have no doubt that………(同位语从句,that不可省略)

There is / Sb. have some doubt whether……..(同位语从句不可用if)

　Sb. doubt if / whether…….

　Sb. don’t doubt that………

23.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)

24…….主句(一般现在时或过去时)…...when从句….(might / should do 或might / should have 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 have succeeded .本该已成功了他却停止努力了.

22. It won(’t) be long be fore +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……..

21. But for+n. / pron.,　 sb. / sth. would (not) have done…..要不是……., 某人早就……(表示虚拟语气)=If it had not been for…..,……./ If there had not been ……., ……..

20. 疑问词+插入语+陈述语序？

Who do you think he’ll have attend the meeting?

19.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……..

　 adj. / adv. enough for there to be…….足够…….会有…….

注意：there being / there to be为there be的非谓语形式；It is said / thought that there is / are……=There is / was / are / were said (thought) to be……. 如：

I have never dream of there being such a good chance for me.

It won’t be cold enough for there to be a frost tonight.