有没有can have done sth?could have done sth有两种意思吗?can't/couldn't have done sth意思又是什么
问题描述：
有没有can have done sth?could have done sth有两种意思吗?can't/couldn't have done sth意思又是什么
能不能举几个例子?
答
can have done \ could have done 用于表示对过去发生的事进行猜测,CAN 只能用于疑问句,否定句,其他情况用COULD,例如WHERE CAN SHE HAVE GONE?SHE CAN HARDLY HAVE GONE TO CHURCH.SHE COULD /MIGHT/MAY HAVE GONE S...