(in nouns 构成名词 a person or thing that performs the action 与…有关的人 lover 情人 computer 计算机
(in nouns 构成名词 a person or thing that has the thing or quality mentioned 具有…的人（或物） three-wheeler 三轮车 foreigner 外国人
(in nouns 构成名词 a person studying or expert in …的人（或物） astronomer 天文学家 philosopher 哲学家
(in nouns 构成名词 a person belonging to 属于…的人 New Yorker 纽约人
(makes comparative adjectives and adverbs 构成形容词和副词的比较级 wider 较宽 bigger 较大 happier 更幸福 sooner 更早