四川省2015高考英语人教版一轮讲义：必修3 Unit 1（2）
While she was on earth she met the herd boy Niulang and they fell in love.她在人间遇到了牛郎，两人相爱了。
句中while she was on earth作时间状语，其中while为连词，表示“当……的时候”。
①He fell asleep while (he was) watching TV.
他在看电视的时候睡着了。
②Mary made coffee while her guests were finishing their meal.
客人们就要吃完饭的时候，玛丽去煮咖啡了。
