辨析专家
〔共性分享〕同学们好！我们是till和untill。首先要告诉大家的是，我们俩可有诸多共性哟——
我俩都神通广大，介词、连词一身兼，在肯定句中与延续性动词相伴，表示动作或状态延续“到……为止”；我俩用在否定句中时，对瞬间终止性动词、延续性动词都开绿灯，表示“直到……才”。此时，我俩就像好朋友一样常可换用。不信请看：
I won’t go till (until) you come. 你不来，我就不走。
Mr Li worked till (until) late at night. 李先生工作到深夜。
〔个性差异〕当需要用在句首表示强调时，until频频“闪亮登场”，而此时till则“深居简出”；若句子倒装，not until会结伴出现在句首（或为倒装句型“It is (was) not until + 被强调部分＋ that...”），此时till则“休闲度假”去了。如：
Until you told me, I didn’t know it at all! 在你告诉我之前，我对此一无所知。
Not until the train disappeared did they leave the railway station. 直到火车从视线里消失，他们才离开火车站。
〔热题聚练〕 1. Not ______ he finished his homework and washed his feet did he go to bed.
2. I stayed up (不睡觉) ______ midnight last night, watching TV.
3. You’d better come earlier. I’ll wait for you ______ 9 o’clock.

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责任编辑:yingyubao