看下这个英语两个句子
问题描述：
看下这个英语两个句子
when I was having breakfast,someone came to visit me.
they were working in the fields when it began to rain.
我们老师在讲的时候说的 while 后可跟ing
when 不行 可是我在报纸上看到了这个句子when I was having breakfast,someone came to visit me.
答
when 后面可以跟 ING 的.
while 后面多半跟 ING, 比较强调动作在进行中.