语音上差不多,语法上差别比较大不能混用的,比如for example后面一定是句子(除非作为插入成分放在句子中间,下面有例子),而like和such as是介词性结构,后面直接接名词或代词.
For example,the word "like" is sometimes a prep.
The word "like",for example,is sometimes a prep.
Words like "like" are sometimes preps.
Words such as "like" are sometimes preps.