现在分词前可以有冠词。这也是和动名词的区别
例如:a  falling  leave
The sleeping boy is Tom.
又如:
1)a moving blackboard正在移动的黑板(moving:现在分词,a moving blackboard=a blackboard which is moving)
2)a walking tractor手扶拖拉机(walking:现在分词,awalking tractor=a tractor which is walking)
例如:
1)The news is very exciting.(exciting:现在分词)
2)Laying eggs is her full-time job.(laying:动名词)
现在分词具有形容词的性质,所以可以用作表语。这种现在分词已变作形容词,可以有比较形式,也可被very等副词修饰,如:interesting,promising,shocking,charming,amusing等。
The situation proves encouraging.
形势是令人鼓舞的。
This book is more interestingthan any that I've ever read.
这本书比我读过的都更有趣。