文中有一句：Our clavichord is kept in the living room.其中be为什么是用is而

our clavichord is kept in the living room.这里为什么不用keep,而用过去分词 Our clavichord is kept in the living room.这句话中,为什么要用is kept? Our clavichord is kept in the living room.这里的living为什么要用ing形 Our clavichord is kept in the living room.这句话里为什么要用kept这个词呢? 请翻译our clavichord is kept in the living room.that’s where we ：our clavichord is kept in the living room,that's where we ( Our clavichord is kept in the living room .That's where we _ our clavichord is kept in the living room改主动语态 Our clavichord is kept in the living room.That's where we ke there is sunshine in the living room. who is in the living room now Everyone in the living room is quiet,quiet为什么是原型