Wiki101.com.tw

人生格言,勵志名言,名人名言,國學,散文,詩詞鑑賞,成語大全,周公解夢

when while有什麼區別 when while的區別

  when while 區別

  when 當什麼時 可表瞬間 事情可同時 或者先後發生

  例子

  it was snowing when we got to the airport 我們到機場時 天在下雪(先後順序)

  while 用於相伴發生的 同時進行

  例子

  some students were reading while others were writing

  有些學生在讀書 有些在寫.

  ①when是at or during the time that, 既指時間點,也可指一段時間,while是during the time that,隻指一段時間,因此when引導的時間狀語從句中的動詞可以是終止性動詞,也可以是延續性動詞,而while從句中的動詞必須是延續性動詞。

  ②when 說明從句的動作和主句的動作可以是同時,也可以是先後發生;while 則強調主句的動作在從句動作的發生的過程中或主從句兩個動作同時發生。

  ③由when引導的時間狀語從句,主句用過去進行時,從句應用一般過去時;如果從句和主句的動作同時發生,兩句都用過去進行時的時候,多用while引導,如:

  a. When the teacher came in, we were talking.

  當此句改變主從句的位置時,則為:

  While we were talking, the teacher came in.

  b. They were singing while we were dancing.

  ④when和while 還可作並列連詞。when表示“在那時”;while表示“而,卻”,表對照關系。如:

  a. The children were running to move the bag of rice when they heard the sound of a motor bike.

  孩子們正要跑過去搬開那袋米,這時他們聽到瞭摩托車的聲音。

  b. He is strong while his brother is weak.

  他長得很結實,而他弟弟卻很瘦弱