Is that your pencil?复数形式

Is that your pencil是什么意思 That is your pencil,__ is that your pencil?的否定回答 Is that your pencil?复数形式 Is that your pencil-box?后一句是什么 This is my pencil ,and that is your.改病句 翻译：What is that in your pencil case? Is that your pencil sharpener.做否定回答 Is that your pencil case?做肯定回答 this is your pencil 同义句转换:Is that your pencil?Is that ____ __________? where is your pencil?where is your pencil? that is缩写是什么?还有Is that your pencil?回答应该是Yes ,it is 还是yes that is? what ( )is your pencil case? Is this your pencil?是什么意思? Is this pencil your?改错 your pencil is longer than ( Is that a pencil s___?