J??

　　join ??

　　［误］ Did you attend the football club???

　　［正］ Did you join the football club???

　　［析］ join经常用于参加某个团体、政党，并作为其中的一个成员；attend则重点强调出会议、到场，而不一定进行具体活动，如： Did you attend the meeting yesterday?而take part in则强调参与某些具体活动或运动，如： I take part in the football game。??

　　just ??

　　［误］ I have finished my work just now.??

　　［正］ I finished my work just now.??

　　［析］ just now意义"刚才"，所以句中的谓语动词要用过去式。??

　　［误］ Just I won the game.??

　　［正］ I just won the game.??

　　［析］ just单独使用时不应放在句首，而应放于① be动词之后，如： He is just a student.② 名词与一般动词之间。③ 用在第一助动词之后，如： I have just returned home. 但just与其他词组成词组时，如just now, just then, 则可用于句首和句尾。如： Just then he saw the bus coming.??

　　just justly ??

　　just常用于三种含意： ① 恰好，如： It's just five o'clock. ② 仅仅，相当于only, 如： I have just enough money to buy a dictionary. ③ 不久前，如： I just missed my old friend; He left a few minutes ago. 而justly其意为"公正的"，如： He was justly punished for his crimes.??