「连续」这个概念在英文中的说法有很多.   最简单的可以用单一副词 consecutively, 例如例句就可以翻成 "We're gonna have two parties consecutively next weekend." 当然你也可以用片语 in a row 或是 back-to-back 来替换这个 consecutively.   In a row 原意是排成一列, 例如 three days in a row 就是三天排成一列, 也就连续三天的意思.  而 back-to-back 字面上则是「背贴背」, 当然也有连续的意思在内. 所以比方说期末考到了, 哇咧, 明天居然连续考三科.  这个用英文说出来就是 "We'll have three tests in a row tomorrow." 或是 "We'll have three tests back-to-back tomorrow."