We use the infinitive of the verb. In the 3rd person Singular (he, she, it - or a name) we put an -s at the end of the infinitive.
infinitive - 3rd person Singular (he, she, it) infinitive + -s
I/we/you/they play football.
He/she/it plays football.
NOTE: he, she, it - Do not forget the -s.
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