【非谓语动词充当状语的Dina,填空处formonthstofindajobasawaitress,finallytookapositionatalocaladvertisingagency,AstrugglingBstuggledChavingstruggledDtostruggle为什么这道题填空处是作句子的状语在】

　　非谓语动词充当状语的

　　Dina,填空处formonthstofindajobasawaitress,finallytookapositionatalocaladvertisingagency,AstrugglingBstuggledChavingstruggledDtostruggle为什么这道题填空处是作句子的状语在其他句子中我也判断不出来是不是作状语求教个方法或讲解下怎么判断状语这个成分啊顺便例几个句子