被动语态的使用时机

Question

No sooner had I ____D____ than the play began.
A. been sat B. seated C. sat D. been seated
>此句为何用 “I had been seated 而不是 I had seated”也就是说此句为何用（哪里表）被动 ?

Answer 1

这里的be seated 是固定用法，如果要说坐下，固定搭配是be seated 或seat oneself
因为seat 的意思是 给…提供桌位，(使)就就座
而sit 过去式sat 坐，可以直接说sb. sit 而不用被动语态

Answer 2

被动语态的基本时态变化
被动语态由“be＋及物动词的过去分词”构成，be随时态的变化而变化。以do为例，各种时态的被动语态形式为：
1) am/is/are +done (过去分词) 一般现在时Visitors are requested not to touch the exhibits.
2)was/were done 一般过去时I was given ten minutes to decide whether I should reject the offer.
进行时态的被动语态加being
3) am/is /are being done 现在进行时A new cinema is being built here．
4) was/were being done 过去进行时A meeting was being held when I was there.
完成时的被动语态加been
5) has /have been done 现在完成时All the preparations for the task have been completed, and we're ready to start.
6) had been done 过去完成时By the end of last year, another new gymnasium had been completed in Beijing.将来时的被动语态加be
7) shall/will be done 一般将来时Hundreds of jobs will be lost if the factory closes.
8) should/would be done 过去将来时The news would be sent to the soldier's mother as soon as it arrived.
9) be going to do 一般将来时
----be going to be done
The problem is going to be discussed at the meeting .
10) be to do 一般将来时
--- be to be done
The meeting is to be held on the 10th of October .

Answer 3

首先得明白seat的用法，这个词作动词用时与汉语不同，它是‘使某人坐下’的意思，例如：
‘我坐下’的英语必须是I am seated，而不能说I seat。
这个词在英语里叫‘使动词’，类似的还有station，这个词当名词用是‘车站’，当动词用是‘使驻扎在某地，或者使某人站岗’，例如：
‘他在门口站岗’，英语是‘He is stationed at the gate’。
所以，你的这道题的答案是D.
明白了吧？如有问题，请追问。追问

请问， I am seated 是系表结构然后变成过去完成时 I had been seated
还是 I am seated 表被动，变成过去完成时的被动语态 I had beed seated
（如果是被动：
那么原句是否为： S + seat + me(S 使我就坐) 因为S未知变被动语态 I am seated (by S)
此时，主词 I 是 动词（seat）的承受者，By S给予省略
）谢谢.

追答

不是系表，事被动语态。你的第二部分说的正确。

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Answer 4

be seated=sit down【就坐，坐下】是一个词组。不是表示被动。
答案D
no sooner 位于句首，句子部分倒装。

Answer 5

前面有have时，用been，have been +过去分词，是现在完成时的被动语态，比如说 大楼已经被建造完成。前面有情态动词，如must，can等时用，情态动词+be+过去分词。