English verb conjugation
MAY RUB

Regular verb: rub - rubbed - rubbed

Affirmation

Simple form	V-ing form
I may rub you may rub she may rub we may rub you may rub they may rub	I may be rubbing you may be rubbing she may be rubbing we may be rubbing you may be rubbing they may be rubbing
Perfect	V-ing perfect
I may have rubbed you may have rubbed she may have rubbed we may have rubbed you may have rubbed they may have rubbed	I may have been rubbing you may have been rubbing she may have been rubbing we may have been rubbing you may have been rubbing they may have been rubbing

Negation

Simple form	V-ing form
I may not rub you may not rub she may not rub we may not rub you may not rub they may not rub	I may not be rubbing you may not be rubbing she may not be rubbing we may not be rubbing you may not be rubbing they may not be rubbing
Perfect	V-ing perfect
I may not have rubbed you may not have rubbed she may not have rubbed we may not have rubbed you may not have rubbed they may not have rubbed	I may not have been rubbing you may not have been rubbing she may not have been rubbing we may not have been rubbing you may not have been rubbing they may not have been rubbing

Interrogative form

Simple form	V-ing form
may I rub? may you rub? may she rub? may we rub? may you rub? may they rub?	may I be rubbing? may you be rubbing? may she be rubbing? may we be rubbing? may you be rubbing? may they be rubbing?
Perfect	V-ing perfect
may I have rubbed? may you have rubbed? may she have rubbed? may we have rubbed? may you have rubbed? may they have rubbed?	may I have been rubbing? may you have been rubbing? may she have been rubbing? may we have been rubbing? may you have been rubbing? may they have been rubbing?

Interro-negative form

Simple form	V-ing form
may I not rub? may you not rub? may she not rub? may we not rub? may you not rub? may they not rub?	may I not be rubbing? may you not be rubbing? may she not be rubbing? may we not be rubbing? may you not be rubbing? may they not be rubbing?
Perfect	V-ing perfect
may I not have rubbed? may you not have rubbed? may she not have rubbed? may we not have rubbed? may you not have rubbed? may they not have rubbed?	may I not have been rubbing? may you not have been rubbing? may she not have been rubbing? may we not have been rubbing? may you not have been rubbing? may they not have been rubbing?