canhavedone造句10字
can have done的用法 -
1.can+have+done表示对过去行为的怀疑，用于疑问句，译成“可能做过……吗？“2.could+have+done是虚拟语气，表示对过去事情的假设，意思是本来能够做某事而没有做。3.could (不能用can) have done “表示“过去本能够做某事却未做。”注意：其否定形式couldn't have done 没有虚拟语气的用法。4还有呢？
Can they have left so soon?难道他们这么快就走了？（表怀疑）He can’t have been to that town.他不可能去过那座城市。（表不确定）lt;><><> could have done 可用于肯定句、疑问句和否定句；用于肯定句表惋惜也可以表示对过去动作的推测，用于疑问句表怀疑，用于否定句表不确定。例如：You c说完了。
1.can+have+done表示对过去行为的怀疑，用于疑问句，译成“可能做过……吗？“2.could+have+done是虚拟语气，表示对过去事情的假设，意思是本来能够做某事而没有做。3.could (不能用can) have done “表示“过去本能够做某事却未做。”注意：其否定形式couldn't have done 没有虚拟语气的用法。4还有呢？
Can they have left so soon?难道他们这么快就走了？（表怀疑）He can’t have been to that town.他不可能去过那座城市。（表不确定）lt;><><> could have done 可用于肯定句、疑问句和否定句；用于肯定句表惋惜也可以表示对过去动作的推测，用于疑问句表怀疑，用于否定句表不确定。例如：You c说完了。
1、can have done 和could have done 的区别can have done是表示应该做某事而没有做，所以既然知道没有做，那肯定是已经发生了。could have done 表示本能做而实际未做，是虚拟语气.2、can't have done和couldn't have done的区别can't have done（不可能做过）是must have done（一定做过）的有帮助请点赞。
He can have been there yesterday.他昨天可能去过那儿。
the meaning of "can have done"? -
can表示可能，have done表示过去完成也就是，可能在过去已经完成的。例如，If I were him,I could have finished all the work.如果我是他，我早就做完所有工作了。It can have been destroyed since 1940s.可能20世纪40年代它就已经被毁坏了。
If you had helped, I could have finished the work.意思：你要是帮了我，我可能已经完成工作了。can have done 则不能用于肯定句中，一般用于疑问句和否定句中，如：Can they have passed the exam? 难道他们真通过考试了？He can’t have been to the city. 他不可能去过那个城市。
can't have been和can' have done有什么区别 -
can t have done 表否定推断，推测肯定没做。The measurement couldn t have been wrong. 测量不可能出错了。He can t have been to that town. 他根本不可能去过那座城市。He can't have taken it home. 他不“can’t have done”表否定推断，推测肯定没做。lt;><><> The measurement后面会介绍。
1. It must have rained last night, for the ground is wet. 昨晚一定下雨了，因为地面还是湿的。2. You must have been mad to speak to the servant. 你和仆人说话，一定是发疯了。二、“can't+have+done”表示对过去事情的否定推测，译成“不可能做过某事”。1. Mr. Smith can't 说完了。
你本来可以买到那本字典的英文翻译用can have done -
你本来可以买到那本字典=> you can had bought that dictionary.
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 SWIMMING.could have done 还可以1,表示某事本来可能发生而没有发生.例如WHY DID 是什么。