While Millie sat down on the sofa,Andy came into the room(改错)

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While Millie sat down on the sofa,Andy came into the room(改错)

While Millie sat down on the sofa,Andy came into the room(改错)
While Millie sat down on the sofa,Andy came into the room(改错)

While Millie sat down on the sofa,Andy came into the room(改错)
把while 改成when 原因是 while 一般表示两个同时进行的动作 而在这个句子中 它的意思是“当millie坐在沙发上时 andy走进了房间 表示的是先后的关系

While Millie was sitting on the sofa,Andy came into the room

将came 改成was coming 就可以了。

While Millie sat down in the sofa,Andy came into the room.
这句 主要考介词 用法“ 坐在沙发上” ——sit in the sofa

While 改成when

把while改成As,两个短动作用As连接