谢邀。长在树上的,注意,“长”,都是on the tree;
挂在树上的,注意,不是生长,都是in the tree。不要去死记老师语法里,关于属不属于树来判断的方法,记得以前很多同学学了反倒晕了,做题老错。
给你一个句子,你理解更清楚:
If I hid some apples among the leaves of my lemon tree, they'd beinthe tree. But I think you mean that it's an apple tree, and the apples are actually growing on the tree. In which case, they'reonthe tree.
希望对你有帮助。