分類舉例如下in+名詞：in the box在盒子裏；in the park在公園；in 1999在一九九九年in+賓格人稱代詞：You will always find a good friend in me.我永遠是你的.好朋友。in+動名詞：He spends a lot of money in entertaining his friends.他花很多錢款待他的朋友。
