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服装的总称，指一件衣服用a piece of, an article of

2. incident, accident

incident指小事件, accident指不幸的事故

He was killed in the accident.

3. amount, number

amount后接不可数名词，

number后接可数名词 a number of students

4. 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.

5. photo, picture, drawing

photo用照相机拍摄的照片，

picture可指相片，图片，电影片，

drawing画的画

Let's go and see a good picture.

6. weather, climate

weather一天内具体的天气状况，

climate长期的气候状况

The climate here is not good for you.

7. 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

take this road; in the street, show me the way to the museum.

8. course, subject

course课程(可包括多门科目)，

subject科目(具体的学科)a summer course

9. 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.

I've got the habit of drinking a lot.

10. 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

11. exercise, exercises, practice

exercise运动，锻炼(不可数)，

exercises练习(可数)，

practice(反复做的)练习 Practice makes perfect.

12. class, lesson

作"课"解时,两者可以替换.指课文用lesson.

指班级或全体学生用class. lesson 6; class 5

13. speech, talk, lecture

speech指在公共场所所做的经过准备的较正式的演说，

talk日常生活中的一般的谈话，讲话，

lecture学术性的演讲，讲课 a series of lecture on…

14. work, job

二者均指工作。work不可数，job可数 a good job

15. couple, pair

couple主要指人或动物，

pair多指由两部分组成的东西 a pair of trousers

16. country, nation, state, land

country侧重指版图，疆域，nation指人民，国民，民族，state侧重指政府，政体，land国土，*

The whole nation was sad at the news.

17. cook, cooker

cook厨师，cooker厨具 He is a good cook.

18. damage, damages

damage不可数名词,损害，损失; damages复数形式,赔偿金 $900 damages

19. police, policeman

police警察的总称，后接复数谓语动词，policeman指某个具体的警察

The police are questioning everyone in the house.

20. problem, question

problem常和困难连系，前面的动词常为think about, solve, raise，question常和疑问连系，多和ask, answer连用

21. trip, journey, travel

travel是最常用的，trip指短期的旅途，journey指稍长的旅途， a three-day trip

22. sport, game

sport多指户外的游戏或娱乐活动，如打球，游泳，打猎，赛马等;

game指决定胜负的游戏，通常有一套规则 His favorite sport is swimming.