class
［误］ The class is watching TV.
［正］ The class are watching TV.
［析］ class作主语时，如果作为整体讲则应用单数形式的谓语动词，如：The class was more than forty in number. 如考虑到具体的每个成员时则应用复数形式的谓语动词，如：The class are, in general, very bright.
clean
［误］ Sorry, I didn't bought it here. I cleanly forgot.
［正］ Sorry, I didn't bought it here. I clean forgot.
［析］ clean可以作为副词讲，其意为"完全"，而cleanly则意为"正确地"、"干净利落地"，如：The knife doesn't cut cleanly. 而clean作为形容词讲时意为"清洁的"、"干净的"，如：Her face is not clean now.
clever
［误］ I'm not clever in English.
［正］ I'm not clever at English.
［析］ clever at是固定搭配，表示在某方面有特长。
close
［误］ It is cold outside. Please keep the door close.
［正］ It is cold outside. Please keep the door closed.
［析］ 这里的close是动词，意为"关闭"，而keep后要加形容词，所以要用close的过去分词形式closed作形容词。作形容词用的close意为"近的"、"亲密的"。
［误］ Come closely so that I can see you.
［正］ Come close so that I can see you.
［误］ Good teaching and good testing are close related.
［正］ Good teaching and good testing are closely related.
［析］ close,closely同样可以作副词用，但其意义不同，close是"靠近"、"接近"之意，而closely则是"紧密"、"严密"、"密切"之意。
［误］ My school was quite close from my home.
［正］ My school was quite close to my home.
［析］ "与……接近"是close to…，例如：
He was close to fifty.
There is a busstop close to the station.
close shut turn
shut与close是同义词，如close the door或shut the door. 但要讲把某人关在门外时则只能用shut somebody out而不能用close，因shut语气较强，并含有隔离之意。而turn off是指关上电视、电灯、煤气之类，有切断之意。
cloth
［误］ The children wear very good cloth to go to school.
［正］ The children wear very good clothes to go to school.
［误］ I need a lot of clothing.
I'm going to make a new cloth.
［正］ I need a lot of cloth.
I'm going to make a new dress.
［析］ cloth是"布"、"布料"，没有复数形式。一块布料是a piece of cloth, 而clothes统指衣服，是复数名词，"一套衣服"要讲a suit of clothes， 如果是"一件件衣服"应讲shirt, dress, sweater等。而clothing是衣物的总称，是不可数名词。例如：This clothing is needed in warm countries.Her clothes are made of fine cloth.英语中的dress是指比较正式的服装，如a school dress(校服)，a student dress(学生套装)，a working dress(工作服)。
coffee
［误］ Please give me two waters.
［正］ Please give me two coffees.
［正］ Please give me two cups of water.
［析］ 虽然coffee, water, tea等都是物质名词，但是只有coffee可用coffees取代若干杯coffee,而其他的却不行，其前要加a cup of或a glass of.
colour(color)
［误］ Colours of flowers are red, yellow and white.
［正］ Flowers are red, yellow and white.
［析］ 中文的"花的颜色有红色、黄色和白色"，若译为英文Colours of flowers are…，就显得重复了。
［误］ I like green colour.
［正］ I like green.
［正］ I like colour green.
［析］ colour green中的colour是green的同位语，所以这种说话方式英语是可以接受的。
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