1.动名词作定语，说明被修饰词的性质、特征或用途。
He may be in the reading room. 他可能在阅览室里。
They set up an operating table. 他们搭起一个手术台。
2.动名词作定语，表示其与被修饰词之间为主动关系，并且表示动作正在进行。
There are about 200 students studying in this school. 大约有200个学生在这个学校学习。
Who is the woman talking to our English teacher? 正在和我们英语[url=http://www.51cok.com/laoshi/]老师[/url]谈话的那个女人是谁?
3.有些动名词已经转化成了形容词，常用作定语修饰物，表示“令人……”：exciting, shocking, puzzling, confusing, disappointing, discouraging, boring, tiring, moving, touching, interesting, satisfying, frightening, amazing等。
That must be a terrifying experience. 那肯定是一次可怕的经历。
The experiment was an amazing success. 那实验是一个惊人的成功。
注意：如果动名词与被修饰词之间是被动关系，就要用它的被动式being done，通常表示正在被做，常作后置定语。
The tall building being built now is our new school. 正在被修建的那建筑是我们的新学校。
That question being discussed was presented by the headmaster.
正在被讨论的那个问题是校长提出来的。
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