问being的用法！！

记得being一般不能太过绝对化的排除

查过相关资料和讨论贴：after, before, since, on和in后不能直接跟过去分词，需要用“being+过去分词

但在一题PREP中却发现不是这样的

For the best extraction of the flavor of saffron threads, it should be soaked in liquid after being pounded with a mortar and pestle.

(A) For the best extraction of the flavor of saffron threads, it should be soaked in liquid after being pounded

(B) To best extract their flavor, saffron threads should be soaked in liquid after pounding

(C) The best way to extract the flavor from saffron threads is soaking them in liquid after being pounded

(D) The best way to extract the flavor from saffron threads is to soak them in liquid after pounding them

(E) The flavor of saffron threads can best be extracted by soaking it in liquid after pounding it

sc破解版语法里说A中的being是多余的

迷茫了。。。。

For the best extraction of the flavor of saffron threads, it should be soaked in liquid after being pounded with a mortar and pestle.

原本我一直没有想通一个问题，就是XDF笔记里说SHOULD比BE TO好，因为后者太主观，所以即使THE WAY ...BE TO DO 。。这么好的表达方式我都第一时间排除。

XDF老师说在错误的选项中选出相对比较正确的答案，我们知道BEING肯定错，（这是笔记里清晰写的）所以很容易排除A/C,

E，B也是被动语态（EXTRACTED)不符合主动优先的原则，故此选择D。但是首先不要产生像我一开始认为的SHOULD不能改变的想法，否则容易导致错误选择B。

谁能解释一下，SHOULD/BE TO的区别，我会万分感谢的！