一、while用作連詞時,有以下幾種含義:
1.意為“當……時候,和……同時”,引導時間狀語從句。例如:While I was watching TV, the bell rang.(我看電視時,鈴響了。)
Meimei watched TV while she ate her supper.(梅梅邊吃晚飯邊看電視。)
2.意為“雖然,盡管”,引導讓步狀語從句。例如:
While it was late, he went on working.(雖然很晚了,但他還在繼續(xù)工作。)
While he is in poor health, he works hard.(雖然他身體不好,但他還是努力工作。)
3.連接兩個并列句子,表示“對比”關(guān)系。例如:
He went out for a walk, while I stayed at home.(他出去散步了,而我卻呆在家里。)
I like singing while she likes dancing.(我喜歡唱歌,而她喜歡跳舞。)
You like sports, while I prefer music.(你喜歡體育,而我更喜歡音樂。)
二、while引導狀語從句時,應注意:
while引導的時間狀語從句既可放在句首,也可放在句末;而while引導的讓步狀語從句一般放在句首,不放在句末。另外,也可以從意義上加以區(qū)分。例如:
While he was tired, he went on working.(雖然他累了,但他還是繼續(xù)工作。)
三、 while用作名詞時,意為“一段時間,一會兒”。例如:I stayed there for a short while.(我在那兒呆了一小會兒。)
The postman came a short while ago.(郵遞員剛剛來過。)