To have

1. Conjugation
Affirmative	Negative	Interrogative
I work You work He works She works It works We work You work They work	I do not work You do not work He does not work She does not work It does not work You do not work We do not work They do not work	Do I work ? Do you work ? Does he work ? Does she work ? Does it work ? Do we work ? Do you work ? Do they work ?
Contracted forms: do not = don't / does not = doesn't
2. Spelling of 3rd person singular (he, she, it)
General rule: infinitive without 'to' + S to work ==> works to play ==> plays Verbs ending in O, SS, X, CH, SH : infinitive without 'to' + ES to go ==> goes to kiss ==> kisses Verbs ending in Y, preceded by a consonant: Y changes into IES to cry ==> cries to fly ==> flies