在工作或学习中，大家常会用到英语否定疑问句，那样什么是不是定疑问句？该怎么用呢？
下面一块儿学习下名词性从句的使用方法及概念吧：
1.How is it that……..
How come+从句?
How does / did sth. come about?
如:How come you are late again?
2.There seems / appears / happens to be / must be / can’t be / is said to be / is thought to be…….
表示 “.好像有/碰巧有/肯定有/不可能有/ 据了解有/觉得有……..”
介词there being
want /wish / expect there to be要/期望/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 to be……. 如：
Eg: 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.
3.疑问词+插入语+陈述语序?
Eg: Whodo you think he’ll have attend the meeting?
4.But for + n. / pron., sb. / sth. would have done…..要不是…….,某人早就……=If it had not been for…..,……./If there had not been ……..
5.It won be long before +从句不久/很长时间就要…….
It was long before+从句不久/很长时间才……..
6.Those who…………..
Anyone who…………= Whoever………..
7…….主句…...when从句…. 表示”对比”,意思为 “本该……而却”,主句中为陈述语气,从句里为虚拟语气
Eg: Why are you here when you should be in school?你本该上学的如何在这儿?
He sTOPped trying when he might have succeeded .本该已成功了他却停止努力了.
8.There is ./ Sb. have no doubt that……… 毫无疑问……
There is / Sb. have some doubt whether……..不确定…是不是…
Sb. doubt if / whether……. 某人怀疑是不是……
Sb. don’t doubt that……… 某人不怀疑……
ately / directly / instantly / the moment +从句
on / upon + n. / doing
No sooner had sb. done than …….
Hardly had sb. done when……..
注意：这几个结构都表示“一…….就”;
time / each time / the last time / the first time / next time +从句
anywhere / everywhere +从句
Eg: You can go anywhere you like.
Next time you come, please bring your son along.
11.If only / I wish +从句 表示虚拟语气, “如果…….就好了” “但愿……就好了!”
12.Considering+ n. 或 pron. 或 that从句 / Seeing that……….考虑到/鉴于…….
Given + n. / pron作状语,表示 “在有……的状况下” “假如有” “假定”,有时也表示”考虑到”
Eg:Seeing 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.
13.Therewas a time when…….过去有那样一度………
than与no, not, none等否定词连用,表示一定意思,如:
Eg: It was none other than Mr. Smith.这正是Smith先生.
15.Not until…….did / do/ does / will sb. do……
It was / is not until ……that sb………
16.It’s like sb. to do / to have done……做某事非常像某人/ 做某事可不像某人
17.It remains to be seen Wh--words ……..是不是…….还有待于看.
18.It only remains for sb. to do……剩下的只不过要某人做某事.
Eg: We’ve got everything ready. It only remains for you to come to dinner.
19.One moment……., and now………刚刚一会儿还在做……而目前却……..
20.Notall / both / everyone………表示部分否定
21.Such is / are……..这就是…….
22.I’d rather do / have done……我宁可…..
I’d rather +从句
23.It’s important / necessary / strange / surprising….+that……
24.I like / hate / appreciate it that / when等从句
Eg: I appreciate it if you will give me a hand.
25.By the time +从句，主句
26.……….,as is often the case with sb. / as is usual with sb.
好了，以上的语法常识同学们知道得怎么样呢？在平时的生活或学习中尽量地多运用哦。
