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
exercise, exercises, practice exercise 运动,锻炼(不可数),exercises 练习(可数),practice(反复做的)练习 take exercise 做运动 3
work, job 二者均指工作
work 不可数,job 可数 a good job,What interesting work it is
cook, cooker cook 厨师,cooker 厨具 He is a good cook
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
problem, question problem 常和困难联系,前面的动词常为 think about, solve, raise,question 常和疑问联系,多和 ask, answer 连用 7
price, prize price 价格,prize 奖,奖品,奖金 win the first prize The price is high/low
a number of, the number of a number of 许多,谓语动词用复数
the number of… 的数目,谓语动词用单数
The number of students is increasing
in front of, in the front of in front of 范围外的前面,in the fro