as作連詞的用法

　　下面是學(xué)習(xí)啦小編為同學(xué)們整理了as作連詞的用法 ，希望大家學(xué)以致用!

　　as作連詞的用法:

　　1.作“在-------期間，當----的時候”引導(dǎo)時間狀語從句.注意與when、 while的用法區(qū)別。

　　①下列情形時,只用as, 而不用when或while。

　　1)用于表示同一個人的兩種動作交替進行,指一邊----一邊. 如:

　　The girl sings as she goes to school.

　　He looked behind occasionally as he went forward in the forest.

　　2)表示兩個同步發(fā)生的動作或行為,意思是隨著-----的發(fā)展.如:

　　As time went on / by, she became more and more beautiful .

　　As children get older, they become more and more interested in everything.

　　3)表示兩個短暫行為或事情幾乎同時發(fā)生.如:I watched her as she read the book.

　　I thought of it just as you opened your mouth.

　　Just as the flying worm hit her face, she gave a loud cry.

　　4)接在名詞后面表示某一個年齡段時.如:

　　As a young man, he was active in sports.

　　②when作"當……的時候"解,可以指較短的(一點)時間,也可指一段時間。如:When I was at college, I could speak several foreign languages. When the clock struck twelve, I had slept for 2hours.

　?、?while常表示一段較長的時間或一個過程,強調(diào)主句謂語動詞與從句謂語動詞同時發(fā)生。如:Work while you work. Play while you play.