I feel sad.I have stomach.This is his reck.改为否定句

I feel hungry.改为否定句 I have finished my homework this morning.改为否定句 This is his pencil.(改为否定句) This is his ruler.(改为否定句) This is his baseball(改为否定句) is this his aunt.改为否定句 This is his teacher(改为否定句) 把i think this story is interesting.改为否定句 I think this movie is interesting 改为否定句 I think this computer is the cheapest.(改为否定句) I Know his name(改为否定句) i know his name改为否定句