一、表示属性、作用或用途
[观察例句]
①There' s always plenty to read in the waiting room.
②They set up an operating table in a small temple.
[归纳用法]
动词ing形式作定语表示被修饰词的属性、作用或用途，作“供……用”讲，相当于介词for短语，常置于被修饰词之前。例如the waiting room＝the room for waiting；an operating table＝a table for operation。
[即学即练1] 完成句子
①He took off his clothes and dived into the swimming pool(游泳池)．
②A sleeping bag(睡袋) is useful when you camp overnight in a field.
