C

　　call ��

　　［誤］ I‘ll call at Mr Brown.��

　　［正］ I‘ll call on Mr Brown.��

　　［誤］ I‘ll call on Mr Brown‘s home.��

　　［正］ I‘ll call at Mr Brown‘s home.��

　　［析］ 作"拜訪"講時，at后面接訪問地點，而on后面接訪問的人。

　　�� call on drop in visit ��

　　call on比較正式的為公務的訪問，如：We were called on by the old students. 而drop in則是比較隨便的走走，順便拜訪，如：If you‘re free, drop in. 而visit則是更正式的外交訪問或友好往來，如：My school‘s headmaster will visit America next week.��

　　can ��

　　［誤］ A blind man can not judge colours.��

　　［正］ A blind man cannot judge colours.��

　　［誤］ I cann‘t call for you at ten.��

　　［正］ I can‘t call for you at ten.��

　　［析］ can的否定形式應為cannot或can‘t.��

　　［誤］ It‘s only six o‘clock. That mustn‘t be the postman.��

　　［正］ It‘s only six o‘clock. That can‘t be the postman.��

　　［析］ must用來表示一種肯定的推斷，如：She must have some problems. She keeps crying. 但在否定句中則要用can‘t， 要表示對過去的推測則要用"must+have+過去分詞"的表達法，如：The lights have gone out.A fuse must have blown.而對過去的否定推測則多用"�ヽan‘t��+have+過去分詞"，如：I don‘t think he can have heard you. Call again.��

　　［誤］ We could not help to laugh at once.��

　　［正］ We could not help laughing at once.��

　　［正］ We could not help but laugh at once.��

　　［析］ "couldn‘t help+動名詞"表示禁不住做了某事。但could not help but與could not but后面要加不帶to的不定式，意思都是不得不去做某事.如：You could not (help) but respect him.��

　　can be able to ��

　　can與be able to都可以用來表示能力，但can只有現在時與過去時，be able to則可用任何時態，如：He will be able to teach the child. 但要表示經過努力而達到的一次性動作則只能用be able to，如：He finally was able to jump over 2��10 meters. 或：The plane was able to fly over the mountain. 但要注意的是這兩個詞都沒有進行時態，而be able to后面不接不定式的被動態。��

　　can could ��

　　can與could都可以用在現在時的口語中，只是用could更為禮貌，語氣更委婉。如：Could you tell us a story?

　　care ��

　　［誤］ I don‘t care coffee.��

　　［正］ I don‘t care for coffee.��

　　［誤］ Take care for your steps.��

　　［正］ Take care of your steps.��

　　［析］ care for是"對某物感興趣"，而care of是"關心，要當心某事"，如：She didn‘t care for him. Take care of what you are doing.��

　　［誤］ I don‘t care where we will go if it doesn‘t rain.��

　　［正］ I don‘t care where we go if it doesn‘t rain.��

　　［析］ 在it doesn‘t matter, I don‘t care, I don‘t mind, 及in case引出的狀語從句后面要用現在時表示將來。如：I‘ve got a football in case we have time for a game.��

　　change ��

　　［誤］ I want to change my camera with that one.��

　　［正］ I want to change my camera for that one.��

　　［析］ change for為"以某物為交換物"。而change with則是"隨……而變"，如：The wood‘s colour changed with the season.��

　　cheap ��

　　［誤］ A teacher‘s salary is generally very cheap.��

　　［正］ A teacher‘s salary is generally very low.��

　　［析］ 工資的高低要用low，cheap是指價格便宜，如果要講物美價廉則要用not expensive, 如：This car is not expensive.��

　　choose ��

　　［誤］ We each had to have a choose of A or B.��

　　［正］ We each had to have a choice of A or B.��

　　［析］ choice是名詞，而choose是動詞。