while在这种情况下,指的是在一个持续的动作中,When 既可以在一个动作点, 也可以在持续动作中,所以这两个题第一个只能用when, 第二个两个都可以比如, While/when I was reading, Mom asked me to have lunch.When the rained stopped, I grabbed my books and went to school....
1Tim was riding his bicycle when he saw his thecher.2.i arrived in Changchun whileit was snowing.另外 你记住 下面的例子 就行了when he came in, iwas reading .while iwas reading ,...
