We were having supper when the phone rang.We were having supper when the phone ringing.We were having supper when the ph
问题描述:
We were having supper when the phone rang.We were having supper when the phone ringing.We were having supper when the phone was ringing .哪个句子是对的?
答
第一个
第三个只要吧when改成while就好了,while接进行时,when接一般式