对于if条件状语从句主句是否使用将来时的一点看法

DUKB24

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.


我想这样的说服力强一点吧，就很顺理成章都用一般现在时（加之是科学研究的发现神马的），按逻辑意思来说这里用主将从现或者主从句现在时都是可以点，这是应该去找出其他知识点的错误了。。。。这个解释倒是让我想起了过去分词和分词在这方面相同的区别，若有相同的帖子请版主删下哈...也欢迎NN们拍砖...本人SC水平还没到家

xohe赵

嗯。NN你当时想没想过这里是主语比较缺省略do的这种东西呢？？