Is that a watch 怎么改为复数句子?

Is that a watch 怎么改为复数句子? Is that a watch?(怎么改为复数形式） is that a watch?改为复数句急 That's a nice watch.怎么改为复数句? It is a watch.(改为复数形式) this is a watch(改为复数句) This is a watch.改为否定句. This is a watch.对a watch提问是什么?that That is my watch.（改为一般疑问句） That is my watch.（改为复数句） That is ciock.（用watch改为选择疑问句） Is that her nice watch 改为肯定的陈述句 that is his old watch.(改为否定句) Is that a dictionary?改肯定句,并作否定回答 I can spell watch（改为一般疑问句） that isn't a watch改为复数形式? That is her watch.（改为同义句） That ___ is ___. The little boy can't tell ________.A.whose is that watch B.whose that watch is C.whose watch is that D.whose watch is That is a watch on the table.怎么改成复数形式