is this your pen? 为什么答案上面是 yes this is 怎么不用yes it is ...

Is this your pen Is this his pen?选择疑问句 This not is your pen,your pen is white.改错 连词成句：this ,your ,is ,pen ,. Is This your pen?No ,it's__________ Is this your pen?同义句转换 ______me,Tony.Is this your pen? Is this your pen怎么解释? Is this your pen 下一句是什么? E____me.Tim.Is this your pen? Is this your pen?Yes,___(thank). Is this your pen?--( ).---Is this your pen?A.pardon B your pardon c I beg is this your pen?----yes,it's. 改错 is this a pen ___ your pencil case This is a new pen.( ) it in your pencil case This is _____（definite) a letter from your pen-friend Is this your pen变成肯定句和否定句 is this your pen（变为肯定句） Is this your pen?（做否定回答）