make vs makes , buy vs buys

[Polyester]

-Running make your body fit.
-Running makes your body fit.

-Mr Smith buy you a cup of coffee.
-Mr Smith buys you a cup of coffee.


Which one is correct?
And tell me why the another one isn't correct.

 

[Matthew Wai]

http://www.grammar.cl/Present/Verbs_Third_Person.htm
Having read the above, I think 'makes' and 'buys' are correct as long as your sentences refer to the present.

 

[Rover_KE]

Polyester, not for the first time: please stop inserting inappropriate emoticons.

There is nothing to be shocked about in those questions.