用來問較廣義的時間或同時涵蓋不同時間的說法。be 動詞相關：When ＋ be 動詞 ＋ S...?如：When is the party?（派對是何時？）助動詞相關：When ＋ 助動詞 ＋ S ＋ 原形動詞...?如：When will you tell her the truth? （你何時要告訴她實情？）
when關係副詞連接詞Whenpin downamountrelaycombchewpass byPull a long facecrayonrubcome to mindclappiratebow tielend an eardirectionvalleytouchingarrowtake upnervousshrimpstart offset fire topearlThanksgiving Dayfirst aid kitgymgestureWalkmanfinish line‘d better (=had better)flushalmostWinnie-the-Poohcapfingerup and downbullyalarm clockI can't help it.boredinterviewtruckbaby sitterslurphaircutchatelevatorspeechless關係代名詞當主詞