表語(yǔ)從句用法講解
1、表語(yǔ)從句概述
用作表語(yǔ)的從句叫作表語(yǔ)從句，它位于主句中的連系動(dòng)詞之后。引導(dǎo)表語(yǔ)從句的詞有從屬連詞that、whether、as though(if)；關(guān)系代詞who, what, which, whom, whose, whatever, whoever, whomever, whichever等；關(guān)系副詞when, where, why, how, however, whenever, wherever等?？梢越颖碚Z(yǔ)從句的連系動(dòng)詞由be, look, remain, seem等。That引導(dǎo)表語(yǔ)從句時(shí)，在口語(yǔ)中，間或可以省略。
The trouble is that we are short of money.困難是我們資金短缺。
That is why stone walls are used instead of fences around New England fields.這就是為什么在新英格蘭用石頭墻而不用柵欄的原因。
At that time, it seemed as if I couldn't think of the right word anyhow.當(dāng)時(shí),我似乎怎么也想不出一個(gè)恰當(dāng)?shù)淖盅蹃?lái)。
2、由從屬連詞that，whether引導(dǎo)的表語(yǔ)從句。
that在引導(dǎo)表語(yǔ)從句時(shí)無(wú)詞義，而whether有詞義，意為、“是否”。這時(shí)主句的主語(yǔ)常常是些抽象名詞，如question(問(wèn)題)，trouble(麻煩)，problem(問(wèn)題)，result(結(jié)果)，chance(可能性)，suggestion(建議)，idea(想法)，reason(理由)等。表語(yǔ)從句對(duì)主句主語(yǔ)進(jìn)行說(shuō)明、解釋，使主語(yǔ)的內(nèi)容具體化。
The trouble is (that) she has lost his money. 麻煩的事是他丟了錢。
The question is whether we need more ice cream.問(wèn)題是我們是否還需要一些冰淇淋。
The problem was that it was too valuable for everyday use.問(wèn)題是它作為日常之用太貴重了。
What she couldn’t understand was that fewer and fewer students showed interest in her lessons. 我們不能理解越來(lái)越少的學(xué)生對(duì)他的課不感興趣。
3、由關(guān)系代詞引導(dǎo)的表語(yǔ)從句。
關(guān)系代詞who, what, which, whom, whose, whatever, whoever, whomever, whichever等引導(dǎo)表語(yǔ)從句，在句中作主語(yǔ)、賓語(yǔ)、表語(yǔ)，關(guān)系代詞不能省略。
The question is which of us should go.問(wèn)題是我們哪一個(gè)應(yīng)該去。
The problem was who could do the work.問(wèn)題是誰(shuí)能做這項(xiàng)工作。
That's what he is worrying about.那就是他在擔(dān)心的事。
That's what we should do.那是我們應(yīng)該做的。
4、由關(guān)系副詞引導(dǎo)的表語(yǔ)從句。
Go and get your coat. It's where you left it. 去把雨衣拿來(lái)。就在你原來(lái)放的地方。
I had neither a raincoat nor an umbrella. That’s why I got wet through. 我們既沒(méi)傘也沒(méi)雨衣，這是我們淋濕的原因。
That is how mice ruin many stores of grain every year.那就是老鼠是怎樣每年損害大量糧食的。
That is what he is worried about.那就是他所擔(dān)心的。
5、由連詞because，as if/as though等引導(dǎo)的表語(yǔ)從句。
It looked as if it was going to snow.看起來(lái)好像要下雪了。
That's because we never thought of it.這是因?yàn)槲覀儚奈聪脒^(guò)此事。
It seems as if he didn’t know the answer.好像他不知道答案。