常用不可数名词 news, word, information, furniture, weather, trouble, difficulty, progress, equipment, knowledge, work, paper, success, failure, homework, housework, music, economy, luck, health, pollution, population, surprise, room（空间）, rain, snow, breakfast, lunch, supper, time, food , money, friendship, attention, notice（留意，注意）, wood, tea, coffee, water, hair, soup, bread, meat, etc. 说明： 1. a knowledge of a population of 2. success, failure表示“成功/失败的人或事”时，可数。 In this exam I am a success, but at yesterday’s party, I was a failure. 3. paper作论文，试卷，报纸解时，为可数名词。 work作著作，作品解时，为可数名词。 She is reading a paper. - Look, she is drawing, and let’s go and see. - Oh, how nice a work it is! 4. surprise表示令人惊奇的人或事时，可数。 You are a surprise to me. He gave me a good surprise. 5. 一日三餐的名词前如果使用了形容词来表示“一顿具体的饭”，可以与a(n)连用。 Today, I had a delicious lunch. 6. have a good/hard time time虽为不可数名词，但表示做某事所用的时间则为可数名词。 7. 通常我们说：a cup of coffee,当coffee前有形容词或分词修饰时，为可数名词。 an iced coffee; a back/white coffee; 咖啡杯子：coffee cup 不能用coffee’s cup, 也不能用the cup of coffee. 本文来源：https://www.wddqw.com/doc/9c9dd3486bdc5022aaea998fcc22bcd127ff420e.html