on the tree     in the tree
①on the tree 表示 “樹(shù)上本身長(zhǎng)的東西” 在樹(shù)上 。

②in the tree 表示 “外界的物體進(jìn)入樹(shù)中” 人或物在樹(shù)上。

There are some apples _on_ the tree .

There is a boy _in_ the tree.

on the tree     in the tree
①on the tree 表示 “樹(shù)上本身長(zhǎng)的東西” 在樹(shù)上 。

②in the tree 表示 “外界的物體進(jìn)入樹(shù)中” 人或物在樹(shù)上。

There are some apples _on_ the tree .

There is a boy _in_ the tree.