join后加什么介词
join in参加，加入；
join by用…连接起来；
join to加在某物之上,使固定在,使加入某方；
join with sb对某人表示同情；
join with sb in同某人一起参加…；
join with sb in doing sth与某人一起干某事
join的例句
The molecules join together to form long strings.
分子连接在一起形成长串。
She gave up her job to join her husband\'s campaign.
她辞了工作以参加丈夫的竞选活动。
He chose to join the company as a market researcher.
You\'re most welcome to join us if you feel so disposed.
你若有意参加，我们非常欢迎。