she has some stickers改为否定句：she does not have any stickers.
含有have和has的句子变成否定句
have和has，变否定句不能在have和has后加not，则需要助动词来帮助解决。
have→do not have或don’t have
has→does not have或doesn’t have (has要变成have)
例：I have a pen. 否定句I don’t have a pen。
My father has a watch. 否定句：My father doesn't have a watch.
句中变否定的规律
1、句中有be动词的，在be动词后加not。
2、句中有情态动词的(can ,should，must ，would)，在情态动词后面加not。
3、句中没有be动词和情态动词的，在动词前加don’t或doesn’t 。
① 句中动词为原形的，加don’t .如： I like apples. I don’t like apples.
②句中动词为三单式的，加doesn’t，并将三单式的动词还原成原形。
如：He likes apples. He doesn’t like apples.
4、肯定句中的some在否定句中应改为any
如：There are some students in the classroom. There are not any students in the classroom.
特殊形式的否定句
(1)肯定句含有every-的合成词时，变否定句时改为no-。
如：Everything is ready.→Nothing is ready.
(2)肯定句中含有always， usually和ever时，变否定句时改为never。
如：He is always late for school.→He is never late for school.
(3)肯定句含有many，much时，变否定句时分别改为few，little。
如：Many students know him.→Few students know him.
(4)肯定句中含有still时，变否定句时应改为no longer。
如：Tom is still in bed.→Tom is no longer in bed.