您好,If you have any requests, let me know soon. 是一个带有(条件状语从句)的句子。 1)主句是 let me know soon(祈使句) 主语 = 默认的 you 谓语 = let(一般现在时) 宾语 = me 宾补 = know 状语 = soon(时间状语) 2)从句 = if you have any requests if = 连词 主语 = you 谓语 = have 宾语 = questions 定语 = any,修饰 questions 这个是一个(一类)条件句,与现在事实相符,使用了(主祈从现)的结构。