帮我把这句话变被动语态：They made the clavidord in 1681

帮我把这句话变被动语态：They made the clavidord in 1681 帮我把这个句子变成被动语态：They will teach us som fench next week. They were cutting trees变被动语态 They will help us(变被动语态) they are worried这句话是被动语态吗,一般现在时的被动语态? 英语高手来帮我把这句改成被动语态再变成否定句和疑问句They make TV sets in that factory. 把下面这些句子变被动语态 语法:感官动词的被动语态I'm feeling the fur coat.我在摸这件毛皮大衣.请问上面这句话可不可以变为被动语态?怎样变?请问,它变成被动语态之后还可以是进行时吗? 有几句话（被动语态）要变一般疑问句把下面几句话变一般疑问句.我不太明白被动语态这点要怎么改.1.It is called a clavichord .这句我改的是：Is it called a clavichord 问下这里的 called 用去ed吗?2.It make 的被动语态He's films always make me laugh.这句话的被动语态怎么变? They often clean their classroom after school变被动语态 they test this new car的被动语态怎么变? They are picking the apples 变被动语态 They used to do it this way变被动语态 where are they repairing my bicycle?怎么变被动语态 请帮我讲解这句话They have been married for 10 yearsThey have been married for 10 years 为什么是have been have been不是现在完成时的被动语态吗 被动语态怎么变? 变被动语态,