3 job作主语时后面的表语可以动名词吗
Mr Titterton is chairman of the Omega Ensemble but
has been the group’s official page turner for the past four years. His job is to sit beside the pianist and
turn the pages of the score so the musician doesn’t have to break the flow of
sound by doing it themselves. He said he became just as nervous as those
playing instruments on stage.
上面一句是2021年新高考全国卷I（乙卷）的阅读理解B有这样一句。
加粗部分的 his job 是主语，后面的不定式 to sit beside the pianist and...是不定式短语用作表语。我的疑问是：这里的不定式可以换成动名词吗？
最佳答案 2021-08-04 22:33
当job作主语且表示日常工作时，它后面作表语的非谓语动词既可用动名词，也可用不定式。如：
The job of the police is to keep the peace. 警察的工作是维护治安。（朗文高级）
My job is selling insurance. 我的工作是推销保险。（朗文多功能）
但如果job只是表示某个特定的动作（即一项需要临时完成的工作任务)，则通接不定式作表语。如：
The first job is to decide who to invite. 要做的第一件事是决定邀请谁。
His next job is to get us to the World Cup finals. 他的下一个任务是把我们带进世界杯决赛。
网友句子中 job 的内容指的是日常工作，所以也可以换成动名词作表语，即：
His job is sitting beside the pianist and turn the pages of the score so the musician doesn’t have to break the flow of sound by doing it themselves.
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