That is a pencil.改为否定句,单复数转换,一般疑问句或提问,肯定句做回答.

that is a pencil.改为复数句 That is a pencil case.(改为否定句) That is a pencil box（改为否定） that is his pencil改为复数句 Is that a pencil s___? 把英文陈述句改为一般疑问句 1.that is a blue ruler 2.it is his pencil 3.this is her pencil-case4.that is his green cup That is a red pencil box.()That is a red pencil box.(改为否定句)____________________________.Is this your baseball?(作否定回答)___________________________. is it a pencil?改为陈述句 this is a pencil 改为一般疑问句 this is a pencil改为复数句 That is a yellow pencil case.改为一般疑问句作肯定笭 That is a pencil(改为复数形式）咋改紧急. That is my pencil box改为一般疑问句 That is my pencil case（改为一般疑问句） That is my pencil sharpener?(改为一般疑问句 that is her pencil case改为一般疑问句 Is that Kate's pencil?(改为复数句) That is his pencil sharpener.改为一般疑问句答语是（ ）（　）（　）pencil　sharpenner