It's my pencil case 改为否定句

It's my pencil case 改为否定句 It`s his pencil case.(改为否定句) It's my pencil sharpener.改为否定句． It's my pencil case.和She's her mother's good daughter.改为复数句. This is his pencil case改为一般否定句 This is my eraser 改为否定句 case my pencil it's yellow 连词成句 It's his pencil box.改为否定句 His pen is in the pencil case 改为否定句 That is a pencil case.(改为否定句) It's his pencil case.(改为复数） You like watching TV否定句 It’s my cousin’s pencil sharpener该否定 It is my pencil.改成否定句