This is my pencil.（改为复数句） It's his backpack.（改为复数句）

This is my pencil ,and that is your.改病句 this is his pen.my is in the pencil box 哪里错了 怎么改 this is his pen.my is in the pencil box 哪里错了 怎么改 This pencil is yours 改一般疑问句 This is my pencil改成一般疑问句 This is my pencil.换成一般疑问句. 改为复句this is my pencil box Not this my is pencil是什么意思 This pencil box is orange.改同义句This is ----- ----- pencil box.下面两个回答不对， This is Lisa's pencil sharpener.改一般疑问句 This is his pencil-box.改为复数句子怎么改? is,too,that,pencil,my,and) (is,case,yellow,this,a,pencil(is,too,that,pencil,my,and) (is,case,yellow,this,a,pencil)连词成句 That is my a pencil-box.改病句 my pencil-box is new,怎样改同义句 Your pencil is shorter than my 改病句 This is my pencil case改为复数形式 Is this my pencil case?回答否定回答 This is my pencil（变为复数句）