This is ablue backpack.(改错为否定句)This a blue backpack.

This is ablue backpack.(改错为否定句)This a blue backpack. This is a blue backpack改为同义句 This is his backpack.改成否定句 This is a blue backpack.(否定句) this————— ———————— blue backpa this is a blue backpack改为一般疑问句 Is this your backpack?改成否定句怎么改 英语的题将下列各句变成否定句和一般疑问句并作简短的肯定 ,否定回答!1.This is a blue backpack. This is a[backpack]变否定句、对画框部分提问、变复数句 This is a backpack.（对.backpack提问） This is a black backpack改为同义句 This is my backpack改为同义句 Who backpack is this?改正错句