1.任何情況用法相同，只不過such as比like正式
2.like 是用來做比較，而 such as 是用來舉例
3.
①Chuck enjoys desserts such as brownies, cheesecake, and macaroons.
②Chuck enjoys desserts like brownies, cheesecake, and macaroons.
the second example suggests a comparison (like brownies…)
whereas the first example implies inclusion (such as brownies…)
4.
①Jane likes furry creatures like rats.
②Jane likes furry creatures such as rats.
The first sentence using “like” implies that Jane likes furry creatures similar to rats, but maybe she does not actually like rats.
In the second example, Jane actually likes rats.
5."like" means similar to, and "such as" means "for example"6.(摘自旋元佑-修辭高峰會)
High-paying occupations like banking and law attract many aspirants every year.(不佳)
like的使用必須平行對稱，banking和law是特定的行業別，而occupations則是各行各業的通稱，兩者的對稱並不工整，應如此修改：
High-paying occupations such as banking and law attract many aspirants every year.(正確)
such的詞類是限定詞，要配合屬於通稱性質的名詞使用(如occupations)，並在as之後列舉一些特稱作為例子(如banking，law)。
1是知識+對兩者普遍的解釋
2~5對兩者差別提出的觀點似乎相同
對6提出的觀點我有些疑問:
Among semiconductors are chemical elements like germanium and silicon, and a lot of chemical compounds such as oxides.
如果照6這樣說，上面這句的like不就應該用such as？按照5的解釋，上面似乎也該改用such as？
我個人想法：
1.like有「類似...」、「像...」的味道；such as則是「例如」，用來列舉實例。(3.4.6的例句似乎都講得通)2.然而such as在某些情況可與like互換，都當作「例如」和「像...」解，而不致於對文意有太大影響。如Among semiconductors....這句3.在中文裡，「例如」往往與「像」劃上等號
Ex:例如玻璃、紙、塑膠這一類的東西都可以被回收。 ＝ 像玻璃、紙、塑膠這一類的東西都可以被回收。
然而「像」並不必然可換成「例如」
Ex:The man like John is over there.(那個像約翰的人就在那邊)
這時like不可換成such as。
由於字典大都只說當「例如」時，such as = like = for example；當 「像...」時，such as = like
但從上面這些例子不難看出他們還是存在些微差異，至於哪些情況可互換似乎只能看語意，不知各位看法如何？
更新1:
我是想問問各位，對於可互換的情形有沒有人已經提出一套具體的講法，或是除了上面列出可能發生歧意的狀況外，其他大部分都是可以隨便互換的.... 看了cavalier大師的講解，可能我的確太執著於找一套規則，而忽略灰色地帶的存在。
