The children were running to move the bag of rice when they heard the sound of a motor bike.
问题描述：
The children were running to move the bag of rice when they heard the sound of a motor bike.
这里的when 可以用while 代替吗
答
不可以!
while 后面一半跟进行时态 这里后面是一般过去式 不是进行式所以不行