need+have+done
@能素952：关于need+完成时的用法needn't have done 表示不必要做,但是已经做了,那么,need have done呢?是不是表示有必要做,但是没有做,还是没有这个说法... - 作业帮
宫翰13576553184…… [答案] needn't have done表示: 过去不必做某事,但事实上做了. John went to the station.He need not have done it. (他本不需要做这件事.) need have done表示有必要做,但是没有做的事. You need have told me about it,but you don't,why?
@能素952：need+have+done 和 need+to+do的区别 -
宫翰13576553184…… 没有need have done这种说法,只有needn't have done (没必要做某事但做了),表责备之意,这里的need属于情态动词.这种用法的结构是情态动词+完成时态.need有两种词性, 一个是做情态动词 ,一个是实义动词. 而need to do的need是实义动词,表示主语有明确动作的.“need”作为实义动词时,通常用法是: 人+need +to do 物+need +doing 物+need +to be done (被动态)
@能素952：情态动词+have done是什么时态? -
宫翰13576553184…… 这里是现在完成时,have加动词过去分词,run的过去分词和动词原形是同样的形式,这里是动词过去分词
@能素952：情态动词加Have done用法 -
宫翰13576553184…… 情态动词后面加have done的情况有两种,一种是,在should,could,need+have done,表示应该做什么,却没有做;能够做什么,却没有做;需要做什么,却没有做的意思.另一种must,should,can,may,might+have done表示对过去的推断,一定做过什么,应该做过什么,能够做什么,也学做过什么
@能素952：情态动词+have done 用法及意义must have done need have done daren't have donecould never have done could have done - 作业帮
宫翰13576553184…… [答案] must have done 一定做了某事(对过去的一种肯定推测) need have done 本需要做某事(但实际没做)(表轻微的责备) daren't have done = didn't dare do (过去)不敢做某事 could never have done不可能做了某事(对过去的一种否定推测) ...
@能素952：英语中的语法之之一:情态动词十have done中,need 十have done .need是情态动 -
宫翰13576553184…… 是情态动词,表示对过去的虚拟.例如:----I spent the whole day finishing the composition yesterday.----You needn't have finished it so hurriedly because it won't be due until next week.译文:---我昨天花了一整天完成这篇作文.---你不需要这么仓促地完成,因为下个星期才交.解析:这里第一个人说了已经完成作文,第二个人用needn't have done表示第一个人本不需要这么仓促地完成.
@能素952：need have done -
宫翰13576553184…… need have done ...本人才疏学浅,没见过这种说法,通常是need to be done,表示需要被完成.如:All the housework needs to be done today. (今天需要完成所有家务.) must have done肯定猜测语气,表示一定已经完成了.如:He ...
@能素952：could have done与would have done 的区别是什么?
宫翰13576553184…… 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 ...
@能素952：情态动词+have done 用法及意义
宫翰13576553184…… must have done 一定做了某事(对过去的一种肯定推测) need have done 本需要做某事(但实际没做)(表轻微的责备) daren't have done = didn't dare do (过去)不敢做某事 could never have done不可能做了某事(对过去的一种否定推测) could have done 本可以做某事(但实际没做) (表轻微的责备)
@能素952：关于need的用法 -
宫翰13576553184…… 情态动词+have +done结构表示对过去动作的推测need haven't done是＂过去需要(应当)不去做＂,强调不做是必须的,比如You need haven't told her the bad news.你不应该告诉她这些坏消息needn't have done是＂过去不应当做某事＂,强调不用,不需要做某事.这个用法见的比较多You needn't have told her the bad news.你没必要告诉她这些坏消息
宫翰13576553184…… [答案] needn't have done表示: 过去不必做某事,但事实上做了. John went to the station.He need not have done it. (他本不需要做这件事.) need have done表示有必要做,但是没有做的事. You need have told me about it,but you don't,why?
@能素952：need+have+done 和 need+to+do的区别 -
宫翰13576553184…… 没有need have done这种说法,只有needn't have done (没必要做某事但做了),表责备之意,这里的need属于情态动词.这种用法的结构是情态动词+完成时态.need有两种词性, 一个是做情态动词 ,一个是实义动词. 而need to do的need是实义动词,表示主语有明确动作的.“need”作为实义动词时,通常用法是: 人+need +to do 物+need +doing 物+need +to be done (被动态)
@能素952：情态动词+have done是什么时态? -
宫翰13576553184…… 这里是现在完成时,have加动词过去分词,run的过去分词和动词原形是同样的形式,这里是动词过去分词
@能素952：情态动词加Have done用法 -
宫翰13576553184…… 情态动词后面加have done的情况有两种,一种是,在should,could,need+have done,表示应该做什么,却没有做;能够做什么,却没有做;需要做什么,却没有做的意思.另一种must,should,can,may,might+have done表示对过去的推断,一定做过什么,应该做过什么,能够做什么,也学做过什么
@能素952：情态动词+have done 用法及意义must have done need have done daren't have donecould never have done could have done - 作业帮
宫翰13576553184…… [答案] must have done 一定做了某事(对过去的一种肯定推测) need have done 本需要做某事(但实际没做)(表轻微的责备) daren't have done = didn't dare do (过去)不敢做某事 could never have done不可能做了某事(对过去的一种否定推测) ...
@能素952：英语中的语法之之一:情态动词十have done中,need 十have done .need是情态动 -
宫翰13576553184…… 是情态动词,表示对过去的虚拟.例如:----I spent the whole day finishing the composition yesterday.----You needn't have finished it so hurriedly because it won't be due until next week.译文:---我昨天花了一整天完成这篇作文.---你不需要这么仓促地完成,因为下个星期才交.解析:这里第一个人说了已经完成作文,第二个人用needn't have done表示第一个人本不需要这么仓促地完成.
@能素952：need have done -
宫翰13576553184…… need have done ...本人才疏学浅,没见过这种说法,通常是need to be done,表示需要被完成.如:All the housework needs to be done today. (今天需要完成所有家务.) must have done肯定猜测语气,表示一定已经完成了.如:He ...
@能素952：could have done与would have done 的区别是什么?
宫翰13576553184…… 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 ...
@能素952：情态动词+have done 用法及意义
宫翰13576553184…… must have done 一定做了某事(对过去的一种肯定推测) need have done 本需要做某事(但实际没做)(表轻微的责备) daren't have done = didn't dare do (过去)不敢做某事 could never have done不可能做了某事(对过去的一种否定推测) could have done 本可以做某事(但实际没做) (表轻微的责备)
@能素952：关于need的用法 -
宫翰13576553184…… 情态动词+have +done结构表示对过去动作的推测need haven't done是＂过去需要(应当)不去做＂,强调不做是必须的,比如You need haven't told her the bad news.你不应该告诉她这些坏消息needn't have done是＂过去不应当做某事＂,强调不用,不需要做某事.这个用法见的比较多You needn't have told her the bad news.你没必要告诉她这些坏消息
