GMAT考试-like/as 的用法 比较

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以下是从Manhattan Review 上摘录的，觉得写得好，就拿上来和大家讨论一下。人家是从词法上来学习语法的。而我们是在记什么公理，规则。

我觉得公理和规则是最害人的，严密逻辑的数学里很多公理都有许多假设前提，更不要说活跃的语言学科了。

其实 句法得当+逻辑理解顺通，我觉得就可以了。

我只不过是个新手，看了人家的REVIEW的一点感触，还请各位轻轻拍。

use "LIKE" before a noun or pronoun,

use "AS" before a clause ,adverb, or prepositional  phrase

use "AS IF"and "AS THOUGH" before a clause
            
"LIKE" is generally used as a preppsition in such a context ,AS is generally used as an adverb while sometimes serving as a preposition with the meaning of "in the capacity of "

as you can tell,the focus of the comparison shifts from the noun when used with "LIKE" to the verb when used with "AS ,AS IF ,AS THOUGH"（以下例题中，红色字体我标记的 comparison 部分，请指正）

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eg:

my  mother's cheesecake tastes like glue.

i love frozen pizza because there is no othe snack like it

my mother's cheesecake tastes great ,as a mother's cheese cake should.

there are times, as now,that learning grammar becomes important

he golfed well again,as in the tournament last year.

he served as capain in the navy

he often told half-truths,as any politician would

he looks as if he knows me.

it looks as if a storm were on the way

he yelled at me as though it were on my fault.