a boy had been with him为什么要用被动语态

Question

a boy had been with him为什么要用被动语态

Answer 1

一、a boy had been with him不是用的被动语态，是过去完成时。
a boy had been with him：一个男孩已经和他在一起
二、过去完成时由“助动词 had + 过去分词”构成，其中 had 通用于各种人称。 例如
They had already had breakfast before they arrived at the hotel.
She had finished writing the composition by 10 ：00 this morning.
三、过去完成时表示“过去的过去”，是指过去某一动作之前已经发生或完成的动作，即动作有先后关系，动作在前的用过去完成时，在后的用一般过去时。 After he had finished his homework, he went to bed.
四、过去完成时的主要用法
1. 过去完成时表示一个动作或状态在过去某一时间或动作之前已经完成或结束，即发生在“过去的过去”。如：
When I woke up, it had stopped raining.
我醒来时，雨已经停了。（主句的动作发生在“过去的过去”）
2. 过去完成时是一个相对的时态，表示的是“过去的过去”，只有和过去某一时间或某一动作相比较时才使用它。如：
He told me that he had written a new book. (had written 发生在 told 之前 )
3. 过去完成时需要与一个表示过去的时间状语连用，它不能离开过去时间而独立存在。此时多与 already ， yet ， still ， just ， before ， never 等时间副词及 by ， before ， until 等引导的短语或从句连用。
如：Before she came to China, Grace had taught English in a middle school for about five years. Peter had collected more than 300 Chinese stamps by the time he was ten.
4. 过去完成时表示某一动作或状态在过去某时之前已经开始，一直延续到这一过去时间，而且动作尚未结束，仍然有继续下去的可能。
如： By the end of last year, he had worked in the factory for twenty years. （ had worked 已有了 20 年，还有继续进行下去的可能）
5. 过去完成时也用于hardly...when...（刚„就„）, no sooner...than... （刚„就„）, It was the first time + that等一些固定句型中。
He had no sooner left the room than they began to talk about him. 他刚离开房间，他们就议论起他来。 We had hardly begun when we were told to stop.

Answer 2

A boy had been with him这个并不是被动语态，这是一个过去完成时，表示过去一直存在但现在已经不存的状态，其形式就是：主语+had been +V-ing /adj/n 等等

这句话的意思是：过去有个小男孩一直跟他在一块

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Answer 3

这个不是被动语态，是过去完成时态。
A boy had been with him before he came to school.
表示过去的状态。