nonprofessional

grammar · medium

易错句子He is a not professional photographer, but he takes great pictures.

正确表达He is a nonprofessional photographer, but he takes great pictures.

汉语用“不/非”直接否定名词，学生便常把 not professional 放在名词前作定语。英语中非职业的、业余的这一含义由前缀 non- 构成形容词 nonprofessional，可直接作定语；not professional 一般只在系动词后作表语（如 He isn't professional），不能这样修饰名词。

grammar · medium

易错句子My uncle is an unprofessional painter; painting is just his hobby.

正确表达My uncle is a nonprofessional painter; painting is just his hobby.

unprofessional 指“不符合职业规范、缺乏职业操守”，带贬义；句中要表达的是“不以此为职业的、业余的”这一中性含义，应用 nonprofessional，否则等于说叔叔画画不守规矩。

grammar · medium

易错句子She became nonprofessional dancer after leaving the troupe.

正确表达She became a nonprofessional dancer after leaving the troupe.

汉语名词前没有冠词，学生容易漏掉英语中单数可数名词必需的冠词。nonprofessional 只是修饰 dancer 的定语，不改变可数名词单数前要加不定冠词 a 的规则。