Is this ruler?(改为否定句）

This is my ruler (改为否定句) Is this ruler?(改为否定句） This is his ruler.(改为否定句) [紧急求助]This is a ruler.改为否定句 This is his ruler.改为否定句.是不是This is not his ruler. This is her ruler.(改为否定句和一般疑问句) ___ ___ ___ her ruler.____ ____ her ruler? this is my ruler改成否定句 It's my pencil case 改为否定句This is her ruler 改为一般疑问句 Is this your ruler?改为同义句 Is this her ruler?改为同义句. Your ruler is in the pencil box.(改为否定句) The ruler is yellow.(改为否定句)OK?! the ruler is in the pencilbox改为否定句 That is her ruler.(改为否定句,疑问句和回答) Is this a ruler?怎么改成否定句 英语改否定句 Is this a ruler 如何改 that’s a ruler in english（对划线部分提问,a ruler） this is an orange（改为否定句） 用英语单词 联句 1 it,is,no,his,pencilbox.2 This,is ,pencil box,hers.This is her pencil box (改为否定句）Is this your ruler?(同义词转换）Is( ) ruler ( )