“使参加比赛”常见的英文表达可以是 "enable someone to participate in a competition" 或者 "get someone to take part in a competition"。
enable someone to participate in a competition：强调赋予某人能力或机会去参加比赛，例如：The new training program is designed to enable more young athletes to participate in the international competition.（这个新的培训项目旨在让更多年轻运动员能够参加国际比赛。）
get someone to take part in a competition：侧重于说服、促使某人去参加比赛，例如：The coach tried his best to get the talented rookie to take part in the upcoming competition.（教练竭尽全力让那位有天赋的新秀参加即将到来的比赛。 ）