no until引導什麼從句

兩者在用法上應注意以下幾點：

1.相關主句謂語必須是持續性動詞,若是終止性動詞,則應爲否定式（因爲終上性動詞一旦被否定就成爲狀態,便可持續）.如：He waited until she was about to leave.他等着一直到她準備離開 didn’t marry until she was over fifty.她直到50多歲才結婚.

2.引導時間狀語從句時,其謂語要用現在時表示將來意義.如：I won’t leave until he comes back tomorrow.我要等他明天回來後再走inue in this direction until you see a sign.一直朝着這個方向走就看見指示牌了.

3.有時其後可跟副詞或介詞短語等.如：He has been ill until recently.他最近一直生病l when are you going to stay here?你在這兒要待到什麼時候?We didn’t eat till past midnight.直到午夜過後我們才吃飯 won’t go home until after the exam.她要考完試之後再回家.如果語境的`需要,有時甚至可以接帶有“引導詞”的從句.如：Don’t leave until after I’ve spoken to you.我和你說完後再離開.