Is that an orange 怎么回答?(肯定,否定)

Is that an orange 怎么回答?(肯定,否定) is that an orange?（作否定回答） This is an orange变否定句疑问肯定回答否定回答 It is an orange .改为一般疑问句并作肯定和否定回答. is this an orange?(做出否定回答) That is an orange .(改为否定句)That______an orange. This is an orange做肯定、否定句 明确句型Is this/that a/an...的肯定句回答（ ）否定回答是（ ） That is an orange改为否定句咋改啊!That ————an orange This is an orange pencilcase.用that改为否定句 The orange is sour改成否定句,一般疑问句,肯定回答,否定回答,对sour提问 That is an English dictionary.改为一般疑问句,并作肯定或否定句回答