語法拓展

表語從句

表語從句在句子中充當(dāng)表語，其功能是說明或解釋主語。表語從句一定要用陳述語序，且引導(dǎo)詞不能省略。

1）表語從句的系動詞除 be 之外，還有 look, seem, appear, sound, taste, feel, remain 等。例如：He has become what he wanted to be ten years ago. 他已經(jīng)成為了十年前他想成為的樣子。

2）表語從句的引導(dǎo)詞包括：連詞 that, whether( that 不能省略，whether 不可以用 if 來替換)；連接代詞等 what, whatever, who, whoever 等；連接副詞 when, where, how, why 等，一些從屬連詞和詞組如 because, as, as if, as though。例如：But it's not as if earlier times didn't know perpetual war, disaster and the message of innocents. 但這不是說以前的時代沒有經(jīng)歷過連續(xù)不斷的戰(zhàn)爭、災(zāi)難和濫殺無辜。

3）需要注意的是，當(dāng)句子主語是 reason 時，表語從句應(yīng)當(dāng)由 that 而不是 because 來引導(dǎo)，且 that 可省略；但可以用“it/this/that is because...”來表示原因。例如：The reason is that modern man seems unable to redesign his institutions fast enough to accommodate the new demands, the new intelligence, the new abilities of segments of society which, heretofore, have not been taken seriously. 原因在于，現(xiàn)代人似乎不能盡快地修正其已形成的各種習(xí)俗以適應(yīng)那些迄今尚未被認真對待的、來自社會各階層的新的需求、新的智慧和新的才干。