could+done
@韶急2833：could have、should have、would have怎么从实质上区分它们?后面都加 done 的形式,很多时候分不清他们具体该如何使用, - 作业帮
佟茂17191593226…… [答案] 本来可以去做某事而没做 could(语气委婉)/can(正式) have done 本应该去做某事而没去做 should have done 本打算去做某事而没有做 would have 诸如此类的还有很多 must have done 还有他们的否定形式 cannot have done本不可以去做某事且...
@韶急2833：could have done与could do区别 -
佟茂17191593226…… 因为是已经过去了的事情,所以用could,而非can;因为是完成了的事情,是完成时,所以要用have.简单地说因为是上个星期,而且是事情已完成,用过去完成时! 另一种解释:这是without引导的隐蔽形虚拟语气,和过去事实相反的,用could+现在完成时.
@韶急2833：can have done的用法 -
佟茂17191593226…… ＂can have done＂是一种情态动词的过去完成时,表示过去某个时间点或动作之前已经完成的动作.它是由“can”和“have done”两部分组成的.其中,“can”是情态动词,表示能力或许可;而“have done”是现在完成时的构成形式,表示过去某个时间点或动作之前已经完成的动作 .例如:- By the time I arrived, he could have finished his work.(到我到达的时候,他可能已经完成了他的工作.)- She can have left already.(她可能已经离开了.)
@韶急2833：could have done的各种用法(在肯定句,否定句,疑问句中) -
佟茂17191593226…… “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. He could have passed the exam, but he was too careless. 本来他能够通过考试,但是他太粗心 疑问句:①Could you have done the exercises? 你可能做完练习吗? 否定句②They couldn't have finished the work so soon. 他们不可能这么快就做完了.
@韶急2833：could have done与would have done 的区别是什么?
佟茂17191593226…… 答:同学你好,请看他们的区别 “would+have+done”虚拟语气,表示对过去事情的假设,意思是“本来会做”. 1. I would have told you all about the boy's story, but you ...
@韶急2833：could/can have done在肯定句都可以翻译成什么,在否定句中都可以翻译成什么?请给个例子,简要说明下 -
佟茂17191593226…… could have done表肯定时,用在虚拟语气中,意思是”可能已经...“ 过去完成时,表示过去本能做完却又未做完的事,如: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.
@韶急2833：could should的用法 -
佟茂17191593226…… could的用法: 一、表过去的可能和许可(多用于间接引语中) At that time we thought the story could not be true. 那时我们认为所说的事不可能是真的. Father said I could swim in the river. 爸爸说我可以在河里游泳. 二、表过去的能力 I could ...
@韶急2833：could have done 的两个含义是什么? - 作业帮
佟茂17191593226…… [答案] “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. He could have passed the exam, but he was too careless. 本来他能够通过考试,但是他太粗心.
@韶急2833：could have -
佟茂17191593226…… 1.could have done的意思是“本可以做某事(而实际上没做)”.句型:Sb could have done sth, but + 一般过去时.的意思为:某人本可以做某事的,但(实际情况是)…….由于后句讲述的是真实情况,故用一般过去时. 我乱弄个句子:You ...
@韶急2833：could have done -
佟茂17191593226…… should have done,must have done都表示该做的没做,是虚拟语气,用于表达与过去的事实相反.但should have done语气上没有must have done重.它们有细微的差别.给你2个句子比较一下: 1)You should not have told him such a bad ...
佟茂17191593226…… [答案] 本来可以去做某事而没做 could(语气委婉)/can(正式) have done 本应该去做某事而没去做 should have done 本打算去做某事而没有做 would have 诸如此类的还有很多 must have done 还有他们的否定形式 cannot have done本不可以去做某事且...
@韶急2833：could have done与could do区别 -
佟茂17191593226…… 因为是已经过去了的事情,所以用could,而非can;因为是完成了的事情,是完成时,所以要用have.简单地说因为是上个星期,而且是事情已完成,用过去完成时! 另一种解释:这是without引导的隐蔽形虚拟语气,和过去事实相反的,用could+现在完成时.
@韶急2833：can have done的用法 -
佟茂17191593226…… ＂can have done＂是一种情态动词的过去完成时,表示过去某个时间点或动作之前已经完成的动作.它是由“can”和“have done”两部分组成的.其中,“can”是情态动词,表示能力或许可;而“have done”是现在完成时的构成形式,表示过去某个时间点或动作之前已经完成的动作 .例如:- By the time I arrived, he could have finished his work.(到我到达的时候,他可能已经完成了他的工作.)- She can have left already.(她可能已经离开了.)
@韶急2833：could have done的各种用法(在肯定句,否定句,疑问句中) -
佟茂17191593226…… “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. He could have passed the exam, but he was too careless. 本来他能够通过考试,但是他太粗心 疑问句:①Could you have done the exercises? 你可能做完练习吗? 否定句②They couldn't have finished the work so soon. 他们不可能这么快就做完了.
@韶急2833：could have done与would have done 的区别是什么?
佟茂17191593226…… 答:同学你好,请看他们的区别 “would+have+done”虚拟语气,表示对过去事情的假设,意思是“本来会做”. 1. I would have told you all about the boy's story, but you ...
@韶急2833：could/can have done在肯定句都可以翻译成什么,在否定句中都可以翻译成什么?请给个例子,简要说明下 -
佟茂17191593226…… could have done表肯定时,用在虚拟语气中,意思是”可能已经...“ 过去完成时,表示过去本能做完却又未做完的事,如: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.
@韶急2833：could should的用法 -
佟茂17191593226…… could的用法: 一、表过去的可能和许可(多用于间接引语中) At that time we thought the story could not be true. 那时我们认为所说的事不可能是真的. Father said I could swim in the river. 爸爸说我可以在河里游泳. 二、表过去的能力 I could ...
@韶急2833：could have done 的两个含义是什么? - 作业帮
佟茂17191593226…… [答案] “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. He could have passed the exam, but he was too careless. 本来他能够通过考试,但是他太粗心.
@韶急2833：could have -
佟茂17191593226…… 1.could have done的意思是“本可以做某事(而实际上没做)”.句型:Sb could have done sth, but + 一般过去时.的意思为:某人本可以做某事的,但(实际情况是)…….由于后句讲述的是真实情况,故用一般过去时. 我乱弄个句子:You ...
@韶急2833：could have done -
佟茂17191593226…… should have done,must have done都表示该做的没做,是虚拟语气,用于表达与过去的事实相反.但should have done语气上没有must have done重.它们有细微的差别.给你2个句子比较一下: 1)You should not have told him such a bad ...
