摘要：before的特殊用法: ①在--之前就-- eg:Mary had finished her homework before her mother returned. ②过了多久后才-- eg:They worked about three days before everything returned to normal. ③来不及--就-- eg:He ran off before I could stop him. ④刚--就-- eg:I had hardly sat down before the bell rang. ⑤否则,以免 eg:Do it now before you forget. ⑥不知不觉就-- eg:Time passed quickly and three months went by before Aqiao knew it. ⑦宁愿--.决不--,与其--.毋宁--.常与will 或would 连用. eg:I’d shoot myself before I apologized to him. [句型]①it was +时间段+before--:过了--才-- ②it was not+时间段+before--:不久就--.没过多久就-- ③it will be+时间段+before--:将要过--才-- ④it will be not+时间段+before--:过不了--就--

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