English verb conjugation
MAY COUGH

Regular verb: cough - coughed - coughed

Affirmation

Simple form	V-ing form
I may cough you may cough he may cough we may cough you may cough they may cough	I may be coughing you may be coughing he may be coughing we may be coughing you may be coughing they may be coughing
Perfect	V-ing perfect
I may have coughed you may have coughed he may have coughed we may have coughed you may have coughed they may have coughed	I may have been coughing you may have been coughing he may have been coughing we may have been coughing you may have been coughing they may have been coughing

Negation

Simple form	V-ing form
I may not cough you may not cough he may not cough we may not cough you may not cough they may not cough	I may not be coughing you may not be coughing he may not be coughing we may not be coughing you may not be coughing they may not be coughing
Perfect	V-ing perfect
I may not have coughed you may not have coughed he may not have coughed we may not have coughed you may not have coughed they may not have coughed	I may not have been coughing you may not have been coughing he may not have been coughing we may not have been coughing you may not have been coughing they may not have been coughing

Interrogative form

Simple form	V-ing form
may I cough? may you cough? may he cough? may we cough? may you cough? may they cough?	may I be coughing? may you be coughing? may he be coughing? may we be coughing? may you be coughing? may they be coughing?
Perfect	V-ing perfect
may I have coughed? may you have coughed? may he have coughed? may we have coughed? may you have coughed? may they have coughed?	may I have been coughing? may you have been coughing? may he have been coughing? may we have been coughing? may you have been coughing? may they have been coughing?

Interro-negative form

Simple form	V-ing form
may I not cough? may you not cough? may he not cough? may we not cough? may you not cough? may they not cough?	may I not be coughing? may you not be coughing? may he not be coughing? may we not be coughing? may you not be coughing? may they not be coughing?
Perfect	V-ing perfect
may I not have coughed? may you not have coughed? may he not have coughed? may we not have coughed? may you not have coughed? may they not have coughed?	may I not have been coughing? may you not have been coughing? may he not have been coughing? may we not have been coughing? may you not have been coughing? may they not have been coughing?