2015衛(wèi)生類職稱英語備考之狀語從句語法詳解：

① 原因：because, since, now that(既然)as, for, this reason....

② 結果：so that, so, therefore, consequently, so as to, as a result ....

③ 時間：after, before, when, while, as, until, as soon as, since, by the time, once, lately, presently, shortly after,currently, at present, nowadays ...

④ 條件：if, only if., once, unless, in the event (that), in case (that), provided that, on the condition that, etc.

⑤ 讓步：though, although, even though(if), no matter what / how / when→ whatever / however / whenever ....

⑥ 目的：in order that, in order to, to,

⑦ 比較：than, as ... as, by comparison(相比較)，by contrast(相對照)....