第1个回答 2014-12-06
表示过去某时正在发生的动作。如:
We were having dinner when they came. 他们来的时候,我们正在吃饭。
I was reading a newspaper at nine o'clock yesterday evening. 昨晚九点我在看报纸。
What were you doing last summer? 去年夏天你干什么来着?
He was talking all the time. 他一刻不停地在讲话。
while表示“在某一段时间里”或“在......期间”,其所引出的从句的动作是延续性的,并侧重表示和主句的动作同时发生。如:
While you were away, two persons came to see you. 你不在时有两个人来找你。
While the teacher paraphrased the text in English, the students listened attentively and took notes. 当老师用英语阐释课文时,同学们注意地听并且做着笔记。
while还可用作并列连词,相当于whereas, 连接一个表示对比的并列分句。如:
Mary was dressed in blue while Jane was dressed in red. 玛丽穿蓝色衣服,而珍妮穿红色衣服。