常见的有以下几种:
一、做谓语用:与动词搭配构成进行时态句子的谓语,如“he is palying a basketball.”、“he becomes exciting.”
二、做非谓语用:
1、做形容词修饰名词,表示主动、持续、进行的含义。如“there is a boy looking at that cat.”
2、做名词(主语、宾语、表语、、、、、)如“watching TV is interesting”
3、做状语,表原因,如“oversleeping this morning,I was late for school.”
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