( ) the girl was shopping, the alien got out.选择: A.when B.while应该要用哪个?

来源:学生作业帮助网 编辑:作业帮 时间:2024/04/29 20:31:24

( ) the girl was shopping, the alien got out.选择: A.when B.while应该要用哪个?
( ) the girl was shopping, the alien got out.选择: A.when B.while
应该要用哪个?

( ) the girl was shopping, the alien got out.选择: A.when B.while应该要用哪个?
B
while+过去进行时,当女孩在购物时,外星人出去了.

b

B:while后面通常加一个时间段,她购物期间

用when.表示当一个动作发生时,另一个动作正在进行。一个是短暂性动词,一个是延续性动词。
如,when i was watching TV,my father came back.
女孩正在购物,alien出去了。

A