This is a pencil case?(改为一般疑问句并做肯定回答）

This is a pencil case?(改为一般疑问句并做肯定回答） this is my eraser.(改为一般疑问句) Is it a pencil?(做肯定回答) This is a pencil box改为一般疑问句 并作肯定及否定回答 the eraser (in the pencil case) is (pink) (改为一般疑问句并作出肯定、否定回答 （1）This is a red basebal (改为一般疑问句,并做肯定回答) 快, That is a pencil case .一般疑问句,并作肯定回答 There is a pencil on the desk?（改为一般疑问句并作肯定回答） is this a pencil case 做肯定回答 This is my pencil 改为一般疑问句 并作肯定回答 This is a big fanily.改为一般疑问句并做肯定和否定回答 she has a pencil改为一般疑问句,并做肯定回答 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