could+have+done表虚拟
英语动词过去式
11．以ould结尾且读音为〔ud〕的情态动词过去式。如：can—could，shall—should，will—would 12．把动词原形中的o改为a，变成过去式。如：come—came，become—became 13．在动词原形后加d或t变成过去式，并且发生音变。如：hear〔hi 〕—heard〔h :d〕， say〔sei〕—said〔sed〕，mean〔mi:n...
不规则动词过去式
如：bring—brought，buy— bought，think—thought，catch—caught，teach—taught11．以ould结尾且读音为〔ud〕的情态动词过去式。如：can—could，shall—should，will—would12．把动词原形中的o改为a，变成过去式。如：come—came，become—became13．在动词原形后加d或t变成过去式，并且发生音变。如...
动词的过去式和过去分词都有哪几种特殊形式
11.以ould结尾且读音为〔ud〕的情态动词过去式。如:can-could，shall-should，will-would 12.把动词原形中的o改为a，变成过去式。如:come-came，become-became 13.在动词原形后加d或t变成过去式，并且发生音变。如:hear〔hi 〕-heard〔h :d〕，say〔sei〕-said〔sed〕，mean〔mi:n〕-meant〔...
求50个英语单词的原形及过去式
11．以ould结尾且读音为〔ud〕的情态动词过去式。如：can—could，shall—should，will—would 2．把动词原形中的o改为a，变成过去式。如：come—came，become—became 13．在动词原形后加d或t变成过去式，并且发生音变。如：hear〔hi 〕—heard〔h :d〕， say〔sei〕—said〔sed〕，mean〔mi:n...
小学六年级下册所有的过去式、比较级、进行时、将来时,急用! 明天要...
11．以ould结尾且读音为〔ud〕的情态动词过去式.如：can—could,shall—should,will—would 12．把动词原形中的o改为a,变成过去式.如：come—came,become—became 13．在动词原形后加d或t变成过去式,并且发生音变.如：hear〔hi 〕—heard〔h :d〕,say〔sei〕—said〔sed〕,mean〔mi:n〕—meant...
过去式直接加ed
11．以ould结尾且读音为〔ud〕的情态动词过去式。如：can—could，shall—should，will—would 12．把动词原形中的o改为a，变成过去式。如：come—came，become—became 13．在动词原形后加d或t变成过去式，并且发生音变。如：hear〔hi 〕—heard〔h :d〕，say〔sei〕—said〔sed〕，mean〔mi:n...
动词的过去式和过去分词都有哪几种特殊形式
11．以ould结尾且读音为〔ud〕的情态动词过去式.如：can—could,shall—should,will—would 12．把动词原形中的o改为a,变成过去式.如：come—came,become—became 13．在动词原形后加d或t变成过去式,并且发生音变.如：hear〔hi 〕—heard〔h :d〕,say〔sei〕—said〔sed〕,mean〔mi:n〕—meant...
谁知道am,is,are,do,does,have,has,go,come,see,win,run,make,fly,put...
11．以ould结尾且读音为〔ud〕的情态动词过去式。如：can—could，shall—should，will—would 12．把动词原形中的o改为a，变成过去式。如：come—came，become—became 13．在动词原形后加d或t变成过去式，并且发生音变。如：hear〔hi 〕—heard〔h :d〕， say〔sei〕—said〔sed〕，mean〔mi:n...
动词过去式规则及不规则变化总结有哪些
规则动词的 过去式 变化如下:1、一般情况下，动词 词尾加 -ed ，如:work ---worked play---played wanted---wanted act---acted 2、以不发音的 -e 结尾动词，动词词尾加 -d，如:live---lived move---moved taste---tasted hope---hoped 3、以辅音字母 + y结尾的动词，把-y变为-i 再...
英语单词过去式总结
27 有 have had had 28 制作 make made made 29 握住,举行 hold held held 30 站 stand stood stood 31 明白 understand understood understood 32 听写 hear heard heard 33 发现 find ...
吴桥县依卡回答：[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.
盖朋13369027507问： could have done的各种用法(在肯定句,否定句,疑问句中) - ？
吴桥县依卡回答：[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,但是他太粗心疑问句:①Could you have done the exercises?你可能做...
盖朋13369027507问： could+have+done的例句和could not+have+done的例句讲语法有点不懂,举个例子 - ？
吴桥县依卡回答：[答案] could+have+done和could not+have+done是两个概念 1、Could have done = would have done 表虚拟语气i.e:He would not die If I COULD HAVE HELPED him.如果当时我能帮助他,他就不会死.(COULD HAVE HELPED可以和WOULD HAVE ...
盖朋13369027507问： can have done的用法 - ？
吴桥县依卡回答： ＂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.)
盖朋13369027507问： could have done与would have done 的区别是什么?？
吴桥县依卡回答： 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 ...
盖朋13369027507问： 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 - ？
吴桥县依卡回答： 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.
盖朋13369027507问： could have ended up是什么时态？
吴桥县依卡回答： 是虚拟时态哈. 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. 例如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.
盖朋13369027507问： 高中英语中can与may,could、might、may、would/+have done 的区别 - ？
吴桥县依卡回答：[答案] 情态动词加have done都是对过去事情的推测,区别只在于情态动词的不同 一、 “must+have+done” 表示对过去事情的肯定推测,译成“一定做过某事”,该结构只用于肯定句. 1.It must have rained last night,for the ground is wet.昨晚一定下雨了,...
盖朋13369027507问： could have done与could do区别 - ？
吴桥县依卡回答： 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.
盖朋13369027507问： 虚拟语气应该怎么用 - ？
吴桥县依卡回答： 虚拟语气 主要从大的来说可以分为三类. 1.表示与现在事实相反的,非真实条件句用(动词的过去时BE的过去时WERE),主句(would ,should ,could ,might)+动词原形 例句,If I WERE you ,I WOULD consider their plan. 2.表示和过去事实相反...
