Study this! The Present Simple Tense

Spelling of third person singular
1: Most verbs add -s to the infinitive	work - works sit - sit stay - stay
2: Verbs ending in a consonant+y change y to i and add -es	cry - cries hurry - hurr reply - repl
3: Verbs ending in -s, -z, -ch, -sh, or -x add -es	miss - misses buzz - buzz watch - watch push - push fix - fix
4: Exceptions: have - has, go - goes, do - does