有几句话（被动语态）要变一般疑问句

这句我改的是.Our clavichord is kept in the living room 把下面几句话变一般疑问句.
3：
Is it called a clavichord ？还是根据时态不同? 问下这里的 called 用去ed吗。我不太明白被动语态这点要怎么改，是在任何时态中都变。
1?
如果变.It is called a clavichord .

我想问下被动语态中的 done 在变成一般疑问句时用变成原形吗？
2，而变.It was made in Germany in 1681

1 不要去掉ed
2 was it made in Germany in 1681?
3 Is our clavichord kept in the living room?
done 不用变

将主动语态的宾语变为被动语态的主语，将主动谓语变为被动谓语(be+过去分词)，将主动语态的主语变为by短语(在被动句中用作状语)。如： he broke the cup. → the cup was broken by him. 一般疑问句变为被动语态的方法，其实就是陈述句变被动语态的一般疑问句形式。如： did he break the cup? → was the cup broken by him?