原型概念:
at a spot表示位于定点
空间的定点:
at the bus stop,at the store
时间的定点:
at 5 pm,at noon,at midnight
相关定点:
look at him视觉点,good at music专长点,amazed at his change讶异点
——劉美君. (2012). 英文文法有道理! 重新認識英文文法觀念. 聯經.
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