1. clothes, cloth, clothing clothes 统指各种衣服，谓语动词永远是复数；cloth 指布，为不可数名词；clothing则指服装的总称。指一件衣服用a piece of,an article of 2. incident, accident incident 表示某事件的变数、插曲；accident 指不幸的事故，但是happy accident 表示意外收获。eg：He was killed in the accident. 3. amount, number amount 后接不可数名词，number 后接可数名词。eg：a number of students 4. family, house, home home 指家，包括住处和家人；house 房子，住宅；family 家庭成员。eg：My family is a happy one. 5. sound, voice, noise sound 自然界各种各样的声音；voice 人的嗓音；noise 噪音。I hate the loud noise outside. 6. photo, picture, drawing photo 用照相机拍摄的照片；picture 可指相片，图片，电影片；drawing 指画的画 eg：Let's go and see a good picture. 7. vocabulary, word vocabulary 词汇，一个人拥有的单词量；word 具体的单词。eg：He has a large vocabulary. 8. population, people population 人口，人数；people 具体的人。eg：China has a large population. 9. weather, climate weather 一天内具体的天气状况；climate 长期的气候状况。eg：The climate here is not good for you. 10. road, street, path, way road 具体的公路，马路，street 街道，path 小路，小径，way 道路，途径 eg：take this road; in the street, show me the way to the museum 11. course, subject course 课程（可包括多门科目），subject 科目（具体的学科）a summer course 12. custom, habit custom 传统风俗，习俗，也可指生活习惯，后接 to do；habit 生活习惯，习惯成自然，后接 of doing. eg：I've got the habit of drinking a lot. 13. cause, reason cause 指造成某一事实或现象的直接原因，后接 of sth./doing sth；reason 用来解释某种现象或结果的理由，后接 for sth./doing sth. the reason for being late 14. exercise, exercises, practice exercise 运动，锻炼（不可数），exercises 练习（可数），practice（反复做的）练习 eg：Practice makes perfect. 15. class, lesson 作"...
