这一点非常重要，因为它可以帮助我们把用作名词前置修饰词的- ing形式和用作复合词第一个构词成分的- ing形式区别开来。

This is important because it helps us to distinguishing forms that are used as a pre-modifier of a noun and those that are used as the first part of a compound word.

youdao

举个例子，名词短语一般会由一个名词再前置一个修饰词组成，如冠词或者形容词。

For example, a noun-phrase will typically consist of a noun preceded by a modifier, such as an article and possibly also an adjective.

youdao