把This is my bike改成否定句
把This is my bike改成否定句
this is my ruler改成否定句
this is my eraser.改成否定句
this is my mother 怎么改成否定句
I can ride my bike.(改成否定句)
This is a pagoda.改成否定句
This is a dog改成否定句
Is this a dictionary?改成否定句
This is his backpack.改成否定句
this is his ring改成否定句
This is my eraser 改成否定句 ——my eraser .
This is my friend 和 These are my sist 改成否定句怎么改啊,急...