(我们正在谈话时,老师进来了。)
The bus had lef twhen we arrived at the bus stop.
(当我们到达车站时,公共汽车已经开走了。)
(arrive是非延续性动词,因此,此句中的when不能用while替换。)
When/While we were having a meeting,our teacher came in.
(我们正在开会时,老师走了进来。)
(have是延续性动词,因此,句中的when可以用while替换。)
4.while引导的状语从句还可以表示某个动作正在进行的同时,另一个动作也在进行之中。例如:
While the teacher was speaking,the students were listening.
(老师讲课时,学生们在听。)
While he was writing,I was reading.
(他写字时,我在看书。)
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