Question

such as后面可以跟句子吗

Answer 1

or example就把他当成是插入语,句子结构不回受到这个插入语的影响,而such as可你把他理解成一个介词的作用,介词后面接名词,动名词.
For example,BBC broadcasts English programmes for China with explanations in Chinese.例如,BBC对中国广播的英语节目配有汉语解释.
English is spoken in many countries,such as Australia and Canada.许多国家都讲英语,例如澳大利亚和加拿大.
由此可见,for example 可带句子,而such as 不行.
l）for example强调“举例”说明,而且一般只举同类人或物中的一个作为插入语,且用逗号隔开,可置于句首、句中或句末.如：
Many people here,for example,John,would rather have coffee.这里有许多人,例如约翰很喜欢喝咖啡.
There are many kinds of pollution,for example,noise is a kind of pollution.有许多种污染方式,例如噪音就是一种污染.
2）such as用来“罗列”同类人或物中的几个例子,可置于被列举的事物与前面的名词之间,但其后边不能用逗号.如：
I have travelled many cities such as Bei jing,Shang hai,and Guangzhou.