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 j ust won the game.
