ls this your eraser?做出否定回答

ls this your eraser?做出否定回答 英语ls this your ls this your ls this your school? ls++this++your++school是什么意思 This it is an eraser.这个句子该用在哪,怎么用?为什么不用This ls an eraser. Is this your eraser怎么回答 is this your eraser的同义句 前面是Is this your eraser is this your eraser?【同义句】 ls this your computer?改为肯定陈述句 ls this your schoolbag的中文是什么 ls this your ruler改为复数句 ls this your backpack? 改为陈述句 ls this your mobile作肯定回答 (yes,it is)(ls it an eraser)(no,it isn't)(ls it your pencil box,too? (yes,it is.)(ls it an eraser)(no,it isn't.)(ls ie your pencil box,too)这些分别是什么意思? 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)_