狀語從句用法總結

　　下面是小編整理的一些關於狀語從句用法的總結， 希望能幫助大家更好地認識狀語從句，提高英語水平。

　　一、由when, while, as引導的時間狀語從句

　　1. when引導的時間狀語從句中的謂語動詞可以是延續性動詞，也可以是瞬時動詞。when有時表示“就在那時”。如：

　　When she came in, I was doing some housework. 瞬時動詞

　　When I lived with the Smiths, we used to discuss international issues together. 延續性的動詞

　　We were about to leave when he came in. when表示“就在那時”

　　2. while引導的時間狀語從句中的謂語動詞必須是延續性的，並強調主句和從句謂語動詞所表示的動作同時發生或者相對應。如：

　　While my wife was reading the newspaper, I was watching TV.

　　was reading是延續性的動詞，was reading和was watching同時發生

　　3. as 引導的時間狀語從句中的謂語動詞表示延續性的動作，一般用於主句和從句動作同時

　　發生，有時也可以強調動作一先一後發生。如：

　　We always sing as we walk.

　　As we were playing out, it began to snow.

　　二、由till或until引導的時間狀語從句

　　till和until一般情況下兩者可以互換，但是在強調句型中多用until。需要注意的是：如果主句中的謂語動詞是瞬時動詞時，必須用否定形式;如果主句中的謂語動詞是延續性動詞時，用肯定或否定形式都可以，但表達的意思不同。如：

　　Don’t open it till your birthday.

　　It was not until the meeting was over that he began to teach me English.

　　Continue in this direction until you see a sign.

　　I didn’t work until he came back.

　　三、由since引導的時間狀語從句

　　1. 若since引導的狀語從句的謂語動詞是終止性的過去時，則從句表示的時間是“從動作開始的那一時刻起”。如：

　　He has studied very hard since he came to our school.

　　We have been missing them since they left here.

　　2. 若since引導的狀語從句的謂語動詞是持續性動詞或表示狀態的動詞的過去式時，則從

　　句表示的時間是“從那持續動作或狀態結束時算起”。如：

　　How long is it since you lived in Shanghai?

　　John is now with his parents in New York. It is already three years since he was a teacher.

　　四、由as soon as, immediately等引導的時間狀語從句

　　as soon as, immediately, directly, instantly, the moment, the instant, the minute等這些詞語均表示“一……就……”。如：

　　I want to see her the moment she arrives.

　　I came immediately I heard the news.

　　注意：hardly scarcely, rarely … when / before; no sooner … than也表示“剛……就……”，但是其主句使用過去完成時，從句用一般過去時，而且，當hardly, scarcely, rarely和no sooner位於句首時，主句應用倒裝語序。如：

　　Hardly had we begun our walk when it began to rain.

　　I had no sooner left than she called.

　　五、由each time, every time引導的時間狀語從句。如：

　　Each time she moved her head she let out a moan.

　　六、由by the time引導的時間狀語從句

　　如果從句的謂語動詞用一般過去式，主句的謂語動詞用過去完成時;如果主句的謂動詞用一般現在式，主句的謂語動詞用將來完成式。如：

　　By the time they get here, we’ll have finished the work.

　　By the time you come here tomorrow, I will have finished this work.

　　七、由the first time引導的時間狀語從句

　　the first time常引導時間狀語從句，其重點不是講第一次做什麼，而是說明另一動作或情況;也可以作表語，強調到說話為止某一情況或動作的次數。如：

　　I knew we would be good friends the first time I met her.

　　比較：for the first time表示有生以來或一段時間內第一次做某事，在句中一般單獨作狀語。如：

　　The two girl students talked for the first time at the beginning of the term.