有区别。

首先,abroad是副词,在国外,通常前面有动词一起搭配,例如Tom went abroad to get further study.汤姆去国外深造。

其次,attend是及物动词,意思是:参加,后面一般跟正式的活动会议。例如,all people should attend the meeting on time.所有人应该准时参加会议。