verb, measure word, adverb, directional · should or ought to

既然做错了事，你就该去向他道歉。

pronoun, verb, preposition, noun · the aforementioned or above-mentioned

该生表现十分优秀。

verb · indicating high probability or that something must be the case

他现在该到家了。

verb · to be someone's turn to do something

该我上场了。

verb · to be in debt to someone

我还该你十块钱。