大学英语三级考试语法复习要点一、动词的时态和语态1. 动词的时态1.1一般现在时1.1.1在下列从句中，主句如用一般将来时，从句用一般现在时代替一般将来时1) 由when, until, the moment, as soon as, after, the next time和 if, unless, in case, whether, as long as, once, however，provided that, supposing 等连词引导的时间状语和条件状语从句中。e.g. If she doesnt tell him the truth now, hell simply keep on asking her until she does.He will call you up the moment he finishes the work. You wont pass the exam unless you study harder.2) 在定语从句中，如，Be quick, or the train will have le
