一、join
join多指参加某组织,成为其中的一个成员。
I don't have time for a drink now, but I'll join you later.我现在没时间喝一杯,但我一会儿和你一起去。
Why don't you ask your sister if she would like to join us for supper?你为什么不问问你妹妹是否愿意和我们一起吃晚饭?
对应的短语动词 join in (sth/doing sth),join in (with sb/sth) 也有类似的意思,例如:
She listens but she never joins in.她只是听,但从来不发表意见。
二、attend
attend常指参加或出席正式的活动或场合,如婚礼,会议等。
The meeting is on the fifth and we're hoping everyone will attend.
会议在5号,我们希望大家都能参加。
Which school do your children attend?
你的孩子上哪所学校?


