Is that her pencil case?（做否定回答）

Is that her pencil case?（做否定回答） Is that her pencil case?(作肯定和否定回答） Is that your pencil case?做肯定回答 Is that your pencil sharpener.做否定回答 Is that () pencil case Is the pencil case under the sofa? 作否定回答 That is a pencil case.(改为否定句) that is her pencil case改为一般疑问句 is that your pencil?的否定回答 her,is,pencil case,that（连成一个完整的句子） 英语 句型转换1.that's a pencil case(一般疑问句,并作肯定回答) 2.her bag is beh is this a pencil case 做肯定回答