V-ing形式的基本用法
（1）作主语：Seeing is believing.百闻不如一见。 Talking is easier than doing. –ing作主语时，如果其结构较长，可用it作形式主语，而将作主语的-ing后置。如： It isn’t much good writing to them again. It’s no use waiting here.
（2）作表语：Her job is washing and cooking. My hobby is collecting stamps. （3）作宾语：作及物动词的宾语。She likes drawing very much.； 作某些短语动词的宾语。
Mary is thinking of going back to New York.;do 限定词（my, some, any, the等） -ing，表示“做…事”之意，如：
We often do our cleaning on Saturday afternoon.
Will you do any shopping on Saturday this afternoon?
（视频/赵颜锌 编辑/林亚节）
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