Question

they are watching tv，改为被动语态？

Answer 1

They are watching TV. 他们正在看电视。

are watching 现在进行时，改为被动语态应该把TV做主语，谓语变成is being watched （正在被看），最后加上by短语by them。即：TV is being watched by them.

Answer 2

被动语态是为了更好地表情达意，不是每一个句子都适合用被动语态。这句话意思是“他们正在看电视”，被动语态意思是“电视正在被他们看着”，这句被动语态似乎没啥必要用。如果仅仅就语法角度，改为被动语态就是“TV is being watched by them”。

Answer 3

答：TV is been watching by them.
分析：
1、此句是现在进行时态，变成被动语态就是“现在进行时态的被动语态”。
2、现在进行时态的被动语态结构是“be+been +V-ing”。
3、变成被动语态时，TV是主语，they变成them，放在介词by后面。

Answer 4

这是现在进行时，它的被动语态为 am/is/are being 再加动词的过去分词，所以是TV is being watched by them.

Answer 5

The TV is being watched by them.
因为是现在进行时，所以要用进行时的被动语态，being done