I may guess you may guess he may guess we may guess you may guess they may guess
V-ing form
I may be guessing you may be guessing he may be guessing we may be guessing you may be guessing they may be guessing
Perfect
I may have guessed you may have guessed he may have guessed we may have guessed you may have guessed they may have guessed
V-ing perfect
I may have been guessing you may have been guessing he may have been guessing we may have been guessing you may have been guessing they may have been guessing
Negation
Simple form
I may not guess you may not guess he may not guess we may not guess you may not guess they may not guess
V-ing form
I may not be guessing you may not be guessing he may not be guessing we may not be guessing you may not be guessing they may not be guessing
Perfect
I may not have guessed you may not have guessed he may not have guessed we may not have guessed you may not have guessed they may not have guessed
V-ing perfect
I may not have been guessing you may not have been guessing he may not have been guessing we may not have been guessing you may not have been guessing they may not have been guessing
Interrogative form
Simple form
may I guess? may you guess? may he guess? may we guess? may you guess? may they guess?
V-ing form
may I be guessing? may you be guessing? may he be guessing? may we be guessing? may you be guessing? may they be guessing?
Perfect
may I have guessed? may you have guessed? may he have guessed? may we have guessed? may you have guessed? may they have guessed?
V-ing perfect
may I have been guessing? may you have been guessing? may he have been guessing? may we have been guessing? may you have been guessing? may they have been guessing?
Interro-negative form
Simple form
may I not guess? may you not guess? may he not guess? may we not guess? may you not guess? may they not guess?
V-ing form
may I not be guessing? may you not be guessing? may he not be guessing? may we not be guessing? may you not be guessing? may they not be guessing?
Perfect
may I not have guessed? may you not have guessed? may he not have guessed? may we not have guessed? may you not have guessed? may they not have guessed?
V-ing perfect
may I not have been guessing? may you not have been guessing? may he not have been guessing? may we not have been guessing? may you not have been guessing? may they not have been guessing?