"That policeman is smart."
Translation:Akamai kēlā mākaʻi.
On the issue already raised, as far as I can see, there is no equivalent to to be in this kind of sentence. At least, none has appeared in any sentence of this type they have provided so far. I would also point out that the hint thing translated 'akamai' as "(is) smart".
My own question is which meaning of smart is the correct translation of 'akamai', clever or well-dressed? Context would tell us in conversation, but doesn't exist here.