由從句擔任的狀語，在句子中可修飾謂語（或其它動詞）、形容詞、副詞或是整個句子，它可以用來表示時間、地點、原因、目的、結果、條件、方式、比較、讓步等。狀語從句是一較大的語法項目，也是近幾年高考題中常見的一個重要試點。高考中已考查了時間、讓步、地點、條件、目的等狀語從句，這些從句仍是今后高考熱點，應作充分準備。同時對方式狀語從句也應引起重視。

（一）時間狀語從句

　　表示時間的狀語從句可由when, as, while, whenever, after, before, till (until), since, once, as soon as (或the moment ), by the time, no sooner … than, hardly (scarcely) … when, every time等引導。 e.g. When I came into the office, the teachers were having a meeting.

　　He started as soon as he received the news. Once you see him, you will never forget him. No sooner had I gone to bed than I went to sleep.

　　（二）原因狀語從句

　　原因狀語從句是表示原因或理由的，引導這類從句的最常用的連詞是because, since, as , now that（既然）等，for 表示因果關系時（它引導的不是從句）為并列連詞，語氣不如because強。

　　e.g. He is disappointed because he didn't get the position.As it is raining, I will not go out. Now that you mention it, I do remember.

（三）地點狀語從句

　　引導地點狀語從句的連詞是where 和wherever等。

　　e.g. Sit wherever you like.

　　Make a mark where you have a question.

　（四）目的狀語從句

　　引導目的狀語從句最常用的詞（組）是so, so that（從句謂語常有情態動詞）, in order that, in case（以防，以免）等。

　　She has bought the book in order that she could follow the TV lessons. He left early in case he should miss the train.