in your grandparents`s room汉语是什么?

in your grandparents`s room汉语是什么? 为什么in your grandparents’room的grandparents要在s的后面加一撇?不是在s后加一撇吗 I think it's in your grandparents' room.这句话是肯定句么? What's in your living room? in your opinion ,what roles can grandparents play in today's what's your company 的汉语是什么 “in your mind”翻译成汉语是什么? 英语翻译Clean your room!Bob's mom is mad.His room is in a mess!S 英语翻译Clean your room!Bob’s mom is mad.His room is in a mess!S my keys are in grandparents'room划线提问 my keys are (in grandparents' room).对括号部分提问 what's your room like?的问句是什么?