同一个名词的可数与不可数

1、2. rain ，snow 是不可数名词，但被形容词修饰时，前面可以加a 。They need rain badly now我们现在严重缺雨。There was a heavy rain this afternoon今天下午下了一场大雨。3. life 作“生活”讲时是不可数名词，被形容词修饰时，前面可以加a 。Life is very hard in some countries in Africa非洲的很多国家生活困苦。We are leading a happy life我们正过着幸福生活。4. time 作“时间”讲时是不可数名词，被形容词修饰时，前面可以加a 。You can was

2、te anything，but don't waste time你什么都可以浪费，但别浪费时间。We had a wonderful time at his party在晚会上我们玩得很开心。5. knowledge 作“知识”讲时是不可数名词， 但可以用做 a good knowledgeof sth 。Knowledge can change a person's fate知识能改变一个人的命运。He has a good knowledge of Chinese他有过硬的中文知识。6. work作“工作”讲时是不可数名词，但可用a work of art表示“一件艺术品”

3、。Every day I have too much work to do每天我有很多工作要做。I bought a work of art我买了一件艺术品。7. success 和 failure作“成功”和“失败”讲时是不可数名词，作“成功的人或成功的事”和“失败的人或失败的事”讲时是可数名词。Pride goes before failure骄者必败。As a businessman，he is a success；but as a father，he is afailure作为生意人他是个成功者，但作为父亲，他是个失败者。8. experience 作“经验”讲时是不可数名词，作“经历

4、”讲时是可数名词。We did it by our personal experience我们根据个人的经验做这项工作。The trip to the desert last time is an unforgettableexperience那次沙漠之行很难忘。9. hair是不可数名词，但可以说some grey hairs(几根白头发) 。The ground is covered with hair地上到处都是头发。My elder brother has already had some grey hairs我哥头上已有一些白头发了。作“火”讲时是不可数名词，作“火灾”讲时是可数名词

5、。Fire is our friend and enemy火既是我们的朋友，又是我们的敌人。There was a big fire in the city last night昨晚城里发生了一场大火。作“单词”讲时是可数名词，作“消息”讲时是不可数名词。We have learned more than 4000 words我们已经学了4000 多个单词。Word comes that there will be a film this evening.有消息说,今晚将有一场电影。注意以下两个短语：have a word with sbabout sth与某人谈论某事have words w

6、ith sb和某人吵架“舒适、安慰”讲时是不可数名词作“给某人带来安慰的人或事”讲时是可数名词。We are living in comfort我们过得很舒适。她现在所需要的是几句安慰的话。Her five-year-old son is a great comfort to her她五岁的儿子是她最大的安慰。作“荣誉、荣幸、光荣”讲时是不可数名词，作“给某人/ 某事增光的人或事”讲时可数名词。She is all honor to our school她是我们学校的光荣。We are fighting for the honor of our country我们在为我们国家的荣誉而战。作“体育运动”讲是不可数名词，作“练习”、“训练”、“体My doctor advises me to take more exercise操”讲时是可数名词。医生建议我加强锻炼。Walking is a good form of exercise走路是一种很好的运动方式。She is doing math exercises in the classroom她在教室里做数学作业。15. 一些可数名词在表示食物时是不可数名词。He keeps ten ducks他养了十只鸭子。He doesn't like roasted Beijing