When a verb ends is s,sh,ch,o,x,z, add ES to the 3rd. person singular (he,she,it)

Examples:

do  -  does
kiss - kisses
wish - wishes
box - boxes
buzz - buzzes
go - goes
fish - fishes
miss - misses
cath - catches

-when a verb ends in y and the previous letter is a consonat, change they to i  and add es:

Example:   study - studies

-When a verb ends in y and the previous letter is vowel,add S to the 3rd person singular.

Examples
play - plays