在工作或?qū)W習中，我們常會使用到英語否定疑問句，那么什么是否定疑問句？該如何使用呢？

下面一起來學習下名詞性從句的用法及定義吧：

1.How is it that……..(這幾個句型都表示“怎么會…….?” “怎么發(fā)生的?”)

How come+從句?

How does / did sth. come about? ( How did it come about that…….?)

如:How come you are late again?

2.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/ 據(jù)說有/認為有……..”

介詞(如of )there being

want /wish / expect there to be要/希望/期待有……..

adj. /adv. enough for there to be…….足夠…….會有…….

注意：there being / there to be為there be的非謂語形式;It is said / thought that there is / are……=There is / was / are / were said (thought) 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.疑問詞+插入語+陳述語序?

Eg: Whodo you think he’ll have attend the meeting?

4.But for + n. / pron., sb. / sth. would (not) have done…..要不是…….,某人早就……(表示虛擬語氣)=If it had not been for…..,……./If there had not been ……..

5.It won(’t) be long before +從句(從句中用一般現(xiàn)在時)不久/很久就要…….

It was (not) long before+從句(從句中用一般過去時)不久/很久才……..

6.Those who………….(從句及主句中謂語動詞用復數(shù)形式).

Anyone who…………= Whoever………..(從句及主句中謂語動詞用單數(shù)形式)

7…….主句(一般現(xiàn)在時或過去時)…...when從句….(might/ should do或might / should have done) 表示”對比”,意思為 “本該……(可)而卻”,主句中為陳述語氣,從句里為虛擬語氣

Eg: Why are you here when you should be in school?你本該上學的怎么在這兒?

He stopped trying when he might have succeeded .本該已成功了他卻停止努力了.

8.There is ./ Sb. have no doubt that………(同位語從句,that不可省略) 毫無疑問……

There is / Sb. have some doubt whether……..(同位語從句不可用if)不確定…是否…

Sb. doubt if / whether……. 某人懷疑是否……

Sb. don’t doubt that……… 某人不懷疑……

ately / directly / instantly / the moment +從句

on / upon + n. / doing

No sooner had sb. done than …….(過去時)

Hardly had sb. done when……..(過去時)

注意：這幾個結(jié)構(gòu)都表示“一…….就”;

time / each time / the last time / the first time / next time +從句(名詞性短語引導一個時間狀語句)

anywhere / everywhere +從句(相當于wherever引導的地點狀語從句)

Eg: You can go anywhere you like.

Next time you come, please bring your son along.

11.If only / I wish +從句(用過去類時態(tài)) 表示虛擬語氣, “要是…….就好了” “但愿……就好了!”

12.Considering+ n. 或 pron. 或 that從句 / Seeing that……….考慮到/鑒于…….

Given + n. / pron作狀語,表示 “在有……的情況下” “如果有” “假定”,有時也表示”考慮到”

Eg: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.

13.Therewas a time when…….曾經(jīng)有那么一度………

than與no, not, none等否定詞連用,表示肯定意思,如:

Eg: It was none other than Mr. Smith.這正是Smith先生.

15.Not until…….did / do/ does / will sb. do……

It was / is not until ……that sb………

16.It’s(un) like sb. to do / to have done……做某事很像某人/ 做某事可不像某人

17.It remains to be seen Wh--words ……..是否…….還有待于看.(不用that, if作連接詞)

18.It only remains for sb. to do……剩下的只是要某人做某事.

Eg: We’ve got everything ready. It only remains for you to come to dinner.

19.One moment……., and now………剛才一會兒還在做……而現(xiàn)在卻……..

20.Notall / both / everyone………表示部分否定

21.Such is / are……..這(些)就是…….(謂語動詞單復數(shù)由后面名詞決定)

22.I’d rather (not) do / have done……我寧愿…..

I’d rather +從句(從句中用過去時或過去完成時)

23.It’s important / necessary / strange / surprising….+that……(用陳述語氣或shoulddo)

24.I like / hate / appreciate it that / when等從句 (it表示后面從句的這種情況)

Eg: I appreciate it if you will give me a hand.

25.By the time +從句(一般現(xiàn)在時/過去時)，主句(將來完成時/過去完成時)

26.……….,as is often the case with sb. / as is usual with sb.(as引導非限制性定語從句)

好了，以上的語法知識同學們了解得如何呢？在日常的生活或?qū)W習中盡可能地多運用哦。