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"...