1before用作连词,引导时间状语从句,除了表示“……之后才”以外,还可以表示“在……之前;不久就;不等……就;以免”。
2句型归纳:
①It won’t be...before...用不了多长时间就会……before从句用一般现在时
②It will be...before...得过多久才……before从句用一般现在时
③It wasn’t...before...没过多长时间就……before从句用一般过去时
④It was...before...过了多长时间才……before从句用一般过去时
(1)Write down the telephone number before you forget it.
记下电话号码以免忘记。
(2)It wasn’t long before he learned to use the computer.
不久他就学会了使用计算机。
多维训练
(1)写出下列句子中before的汉语意思
①Before he came here,he was in England.在……之前
②It will be some time before we know the full results.得过多久才……
③Before we had walked five miles,Anne complained of sore feet.不到……就
④Put that away before it gets broken.以免
(2)完成句子
①The meaning of the word “nice” changed a few times before it finally came to include the sense “pleasant”(直到最后它才包含pleasant的含义).
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