可数名词
中文翻译：动词不定式同义词
同义词：
['to do', 'to be doing', 'to be about to do']
例句：
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1. I need to finish my report before the deadline.
我需要在截止日期前完成我的报告。
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2. She is about to leave for a trip.
她即将出发去旅行。
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3. We are to meet at the airport tomorrow morning.
我们明天早上在机场见面。