People knew time was an abstract conception through other conceptions of concrete images. Ontological metaphors, orientational metaphors and structure metaphor were the main ways of time metaphor.

人们通过其他具体形象的概念来认知时间这一抽象概念，实体隐喻、空间隐喻和结构隐喻是时间隐喻的主要方法。

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Conceptual metaphors can be classified according to the cognitive functions they perform into three types: structural metaphor, ontological metaphor, and orientational metaphor.

根据概念隐喻的认知功能，它们被分成三类：结构隐喻，本体隐喻和方位隐喻。

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