语法讲解：动名词
语法归纳：动名词由“V + ing”构成，是兼有动词和名词一部分性质的非谓语动词，可以通俗地 理解为表达动词的含义而具有名词的词性。
动名词在句子中可充当主语、宾语、表语、定语等：
1）动名词作主语：
Saving is having.
节约就是财富。
Finding a good job is very difficult now.
现在找一个好工作很难。
Watching television is a waste of time.
看电视就是在浪费时间。
2）动名词作宾语：
I am interested in dancing and travelling.
我对跳舞和旅行很感兴趣。
She was afraid of making mistakes.
她害怕犯错误。
3）动名词作表语：
His job was testing voice of the movie.
他的工作是测试电影的声音。（testing在此并不构成进行时态）
对比：He was testing voice of the movie.
他当时真在测试电影的声音。（was testing为过去进行时)
4）动名词作定语：
peace-keeping police 维和警察；fact-finding committee 调查委员会
