if 引导的条件状语从句修饰主句：doing something you love 是现在分词短语作方式状语

还有时间状语
例如 You can‘t do it until you like it .这里面包含主you 谓like 宾语it
例如 When facing the difficulty ,I will be nervous .这里facing the difficulty是动宾结构
还有方式状语
例如 By facing the difficulty directly ,you will know how to deal with it .这里facing the difficulty 是动宾结构