i am sorry,miss smith.i"ve broken your glasses. it doesn"t matter,mike,but you__careful

问题描述:

i am sorry,miss smith.i"ve broken your glasses. it doesn"t matter,mike,but you__careful
(should have been)为什么不填must be?

语句中的i是已经打碎了miss smith的眼镜了,已经完成了这个动作,所以用should have been,你本应该小心一些