this is a bag 改为否定句是什么

this is a bag 改为否定句是什么 that is a bag改为否定句 This is a rad bag的否定句 this is a map.(改为否定句) This is a watch.改为否定句. this is letter A.改为否定句 This is a clock改为否定句 This is a lion.改为否定句 This is my bag改为同句 This bag is This is a UFO改为否定句还有This is a letter A 改为否定句 Sonia has a bag 改为否定句 this bag is hers.改为同义句 This bag is small改为同义句 这是新概念英语青少年版1a（Unit1-2)试卷的第二题,请给我答案,我现在很需要这个的答案,This is my bag.(改为否定句)_____________________That is your mobile.（改为否定句）__________________________.This is your c This is a book.(改为否定句） this is a map of china改为否定句 tHIS IS A MAP OF cHINA.改为否定句 [紧急求助]This is a ruler.改为否定句