狀語從句又稱副詞性從句，指句子用作狀語時(shí)，起副詞作用的句子。它可以修飾謂語、非謂語動(dòng)詞、定語、狀語或整個(gè)句子。根據(jù)其作用可分為時(shí)間、地點(diǎn)、原因、條件、目的、結(jié)果、讓步、方式和比較等從句。狀語從句一般由連詞(從屬連詞)引導(dǎo)，也可以由詞組引起。從句位于句首或句中時(shí)通常用逗號(hào)與主句隔開，位于句尾時(shí)可以不用逗號(hào)隔開。

　　1.時(shí)間狀語從句

　　常用引導(dǎo)詞：when, as, while, as soon as, before, after, since, till, until

　　特殊引導(dǎo)詞：the minute, the moment, the second, every time, the day, the instant, immediately, directly, no sooner…than…, hardly…when, scarcely…when

　　【例句】You must learn to consult your feelings and your reason before you reach any decision.在你做任何決定之前，你得學(xué)會(huì)顧及你的感覺和你做此決定的原因。

　　2.地點(diǎn)狀語從句

　　常用引導(dǎo)詞：where

　　特殊引導(dǎo)詞：wherever, anywhere, everywhere

　　【例句】Where there is a will, there is a way.有志者，事竟成。

　　3.原因狀語從句

　　常用引導(dǎo)詞：because, since, as, for

　　特殊引導(dǎo)詞：seeing that, now that, in that, considering that, given that

　　【例句】Mark needs to learn Chinese in that his company is opening a branch in Beijing.馬克需要學(xué)習(xí)漢語是因?yàn)樗�的公司要在北京開分公司。

　　4.結(jié)果狀語從句

　　常用引導(dǎo)詞：so…that, such…that

　　特殊引導(dǎo)詞：such that, to the degree that, to the extent that, to such a degree that

　　【例句】It was so dark that we could see nothing in front of us.天很黑，我們看不見前面的任何東西。

　　5.目的狀語從句

　　常用引導(dǎo)詞：so…that, such…that

　　特殊引導(dǎo)詞：such that, to the degree that, to the extent that, to such a degree that, in order that

　　【例句】They carved the words on the stone so that/in order that the future generation should/might remember what they had done.他們把字刻在石頭上以便后代能記住他們的所作所為。

　　6.條件狀語從句

　　常用引導(dǎo)詞：if, unless, whether( whether…or not)

　　特殊引導(dǎo)詞：as/so long as, only if, providing/provided that, supposing that, in case that, on condition that

　　【例句】I took my driving license with me on holiday, in case I wanted to hire a car.假期時(shí)我?guī)�上我的駕照，以防萬一我想租一輛車。

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