ls this your pen改为否定回答,怎么改

ls this your pen改为否定回答,怎么改 ls this your pen?(改为肯定句） ls this your eraser?做出否定回答 ls this your computer?改为肯定陈述句 ls this your ruler改为复数句 ls this your backpack? 改为陈述句 ls this your pen?yes,itisn't 哪里错了? 英语ls this your ls this your ls this your school? He is Lily's uncle 【改成否定句】 ls this her book [改为复数】 the is your boy brother [连词成句】 Is this your pen变成肯定句和否定句 Is this your pen?（做否定回答） is this your father?改为否定形式 ls++this++your++school是什么意思 are you sonla(做否定回答） that is my eraser（改为一般疑问句）that is my pencil sharpener(改为一般疑问句)ls your last name green(作否定回答)lt ls my red eraser(改为同义句)this is an english book(对划线部分提问)_ ls she your grandmother?作否定回答 Ls she your daughter?作否定回答