> 形容詞：通常形容人或事物的狀態、性質、大小等，通常用在名詞前，be動詞之后。 beautiful-the beautiful girl ``` The girl is beautiful. ``` > The+形容詞=復數名詞，表示一類，后面的動詞使用復數 old-the old young-the young ``` The old need more care than the young. ``` ``` She is a good student. This bike is expansive. The rich sometimes complain their empty life. 富人有時抱怨他們空虛的生活。 ```