she is best .best 前面要不要加the?

she is best .best 前面要不要加the? it is best to 的best前面为什么不用the? she is the best studend in english. She is children's best teacher.对不对? which is the best?还是 which is best?最高级前面是要定冠词，但关键是best 后没有名词。 What is your favorite food?I like cookies best.为什么best前面不加the best best best best Best best best best best best She likes dogs best. My g____ is 70 ,and she is my best friend.