one writer believes that the expression might have come from an old saying. 请问句子中的have是做什么用的？

如题.

2016-07-12 提问者:13673390050

教师解答

解婷

表示时态，come的过去分词仍是come，所以在这，作家认为的事情是现在完成时

2016-07-12

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解婷

have been 是现在完成时 1、have been可以认为是现在完成进行时的标志.结构have been doing. 一般来说现在完成进行时有两种用法.一表示过去的动作延续到现在,并有可能延续下去: He has been working out all day.他整天在锻炼.(暗示有可能继续锻炼.) 二是现在完成进行时有时富有情感色彩.这是现在完成时所没有的功能: He has been always talking with his girlfriend. 他总在跟女友唠叨.(有情感色彩) He has always talked with his girlfriend. 他总跟女友聊天.(没有感情色彩) 2、have been可以认为是现在完成时的主动形式和被动形式,如: He has gone to work. 他已去上班了.(主动) He has been arrested.他被逮捕了.(被动) had been 是过去完成时 即过去完成过什么动作 做过这件事 i had been a good student 我过去曾经是一个好学生 had been也可用在虚拟语气中 表示假设 比如说 if i could go to school, i had been a good student

2016-07-12

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解婷

had been 是过去完成时 即过去完成过什么动作 做过这件事 i had been a good student 我过去曾经是一个好学生 had been也可用在虚拟语气中 表示假设 比如说 if i could go to school, i had been a good student

2016-07-12

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解婷

前面动词是believes，加了s，所以后面用have been

2016-07-12

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