> 
> According to Guinnessworldrecord.com, the most piano key hits in one
> minute is 824, achieved by Domingos-Antonio Gomes (Portugal) in
> Lisbon, Portugal, on 4 March 2017. I knew this sentence has to be
> grammatically correct, but I still have two questions:
> 
> 
> 

**1) Why is the word "hit" used as a third-person singular form?** I thought it should be used as a past participle ("hit"), in order to form the perfect tense, like "the biggest cake **made** by a human being" or "the funniest joke **told** by my father". Is it because "hit", in this case, is a predicate verb (whose subject is "key") and not a postpositive determiner？But shouldn't the subject of a hit be a person?

**2) Why is the word "key" in the singular form here?** Since it is modified by "most", I thought the countable noun "key" should be put in plural form (keys), like "the most **votes** I've ever got".

Can someone explain that to me? Thanks so much.