Is the watch on the table yours?里面的the可以换成this吗?可以的话 为什么watch前面不加冠词a?

(the watch) is on the desk.对括号部分提问 is,whose,watch,on,the,desk,the连词成句 my watch is on the sofa变否定句 The child is watch a cartoon on TV. watch,on,the,is,your,dresser连词成句 Is there a watch on the desk?改为复数句 Mon's watch is on the TV.改为疑问句 What is the time ___your watch?填by还是on? His watch is on the his bed.变为否定句 On the Watch Night,there is a big f___ dinner your watch is on the sofa 对 on the sofa 提问 There is a watch on the desk.对a watch提问 改错The basketball game is worth to watch on TVA（game） B(is) C(to watch) D(on) on the watch和on watch分别是什么意思? The watch on the sofa is y father's.对my father's 提问.---- ----the watch on the sofa.在横线位置填. what is the time_____your watch The watch is on the desk (这是答语该怎么提问) Look!There is a watch to the on the ground.改错