Sit down on this chair.改为否定句

Sit down on this chair.改为否定句 I sit on a chair .改为一般疑问句,否定句,肯定回答,和否定回答,还有 sit down,please 改为否定句 You can sit on the chair.(改为否定祈使句) Sit down on the chair.是什么意思 the chair is too hard to sit on.改为同义句 the chair i they`re on the chair.改为否定句 The bird is on your chair改为否定句 Sit on the desk,please.如何改为否定句 I spend 50 yuan on this chair.改为同义句. Open the pencil box.（改为否定句 Don’t sit down,please.（改肯定句） 把"please sit down"改成否定句