Definitions
Etymology
Origin unclear. The bottom component 止 represents the sound.
About
是 is of unclear origin. It combines 日 (sun) on top with 止 (foot) below, the lower component likely indicating the sound. Originally an adjective meaning "correct" or "right", it affirmed the truth of a statement. This sense gradually developed into a copular verb equivalent to English "to be", linking a subject to a predicate. It also functions as an affirmative response "yes", a direct outgrowth of its earlier meaning of correctness.
Etymology Hide
Example Sentences Hide
这是我的书。
他是我的爸爸。
北京是中国的首都。
学习是很重要的。
她是我最好的朋友。
这本书是很有趣的。
我们的目标是赢得比赛。
他之所以成功是因为努力。
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