形容词性介词短语：修饰名词，放在名词后面

The show on television tonight is about snow leopards(豹) in Asia.（On television tells us which show. In Asia tells us which leopards.）

副词性介词短语：修饰动词和形容词

形容词：

I am hungry because of this diet. (Because of this diet tells why I'm hungry.)

I am familiar with your girlfriends

动词：

We will go snowboarding in the winter. (In the winter tells when we will go snowboarding.)

In the winter, we will go snowboarding（滑雪板运动）.

We will, in the winter, go snowboarding.

You can run pretty quickly in those high heels. (In those high heels tells when you run quickly.)