in the tree在树上,而不是长在树上 例如：A bird is singing in the tree.
on the tree长在树上 例如：There are many apples on the treee.对不起，我问的是in the 和on the的区别你的提供语境，比如给一个例句in the 一般指：在......里面on the......:在.......上面