They can’t have been doing their homework,能不能改成下面句子They isn't doing their homework----------------改前和改后的句子除了语气不一样外,还有别的不一样吗?
问题描述:
They can’t have been doing their homework,能不能改成下面句子
They isn't doing their homework
----------------改前和改后的句子除了语气不一样外,还有别的不一样吗?
答
如果原句没有讲明时间的话,没有什么其他的区别.