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s marching towards us. Right: It looked as if he had understood this question. ,在有表語(yǔ)從句的復(fù)合句中,主句時(shí)態(tài)和從句時(shí)態(tài)可以不一致。 Right: The question is who will travel with me to Beijing tomorrow. Right: The question is why he cried yesterday. 。 知識(shí)點(diǎn) 3: 表語(yǔ)從句的用法及固定句型 表語(yǔ)從句只能置于主句之后,而主句的動(dòng)詞只能是聯(lián)系動(dòng)詞。 名詞性從句在 be 等系動(dòng)詞后作表語(yǔ)時(shí)被稱(chēng)為表語(yǔ)從句 . 例如: The problem is how we can get the things we need. (how 在表語(yǔ)從句中充當(dāng)方式狀語(yǔ) ) 問(wèn)題是我們?cè)鯓幽芘轿覀冃枰臇|西 。 The scissors are not what I need. (what 在表語(yǔ)從句中充當(dāng)賓語(yǔ) ) 這把剪刀不是我所需要的。 What I told him was that I would find him a good play. 我告訴他的是我會(huì)給他找個(gè)好劇本。 (what 在主語(yǔ)從句中作直接賓語(yǔ), that 作為表語(yǔ)從句的引導(dǎo)詞在該表語(yǔ)從句中不充當(dāng)句子成分, 不能省略 ) That is what I want to tell you. (what 在表語(yǔ)從句中充當(dāng)直接賓語(yǔ) ) 那就是我想要對(duì)你 講的。 That is why she failed to pass the exam. (why 在表語(yǔ)從句中充當(dāng)原因狀語(yǔ) ) 那就是她考試不及格的原因。 注意: “That is why...” 是常用句型, 意為 “ 這就是 ? ? 的原因 /因此 ??” , 其中 why 引導(dǎo)的名詞性從句在句中作表語(yǔ), 該句型通常用于針對(duì)前面已經(jīng)說(shuō)明過(guò)的原因進(jìn)行總結(jié), 又如: That iswhy you see this old woman before you know, Jeann