标题: 对于if条件状语从句主句是否使用将来时的一点看法 [打印本页] 作者: DUKB24 时间: 2012-5-20 20:15 标题: 对于if条件状语从句主句是否使用将来时的一点看法 A study commissioned by the Department of Agriculture showed that if calves exercise and associated with other calves, they will require less medication and gain weight quicker than do those raised in confinement. (A) associated with other calves, they will require less medication and gain weight quicker than do
(B) associated with other calves, they require less medication and gain weight quicker than
(C) associate with other calves, they required less medication and will gain weight quicker than do
(D) associate with other calves, they have required less medication and will gain weight more quickly than do
(E) associate with other calves, they require less medication and gain weight more quickly than
一直很疑惑这里为毛不是初中学的顺口溜主将从现，虽然可以通过其他语法点排出正确答案，但是还在复习过程中应该锱铢必较吧... 刚百度了一下，发现自己out了，附上if条件状语从句的两个用法 在 if 引导的条件状语从句中，如果从句谈论的是一个有可能发生的事实及其产生的相关的结果，主句用一般将来时态，从句用一般现在时态。如： We can walk there if we can't find a bus . If it rains tomorrow , we will not go to the zoo.
What will you do if you find a panda in danger. 如果 if 条件句谈论的是重复发生和预示要发生的情景和事件，则主从句大多用一般现在时态。如： If bears are in danger ,they attack people.