I may authenticate you may authenticate he may authenticate we may authenticate you may authenticate they may authenticate
V-ing form
I may be authenticating you may be authenticating he may be authenticating we may be authenticating you may be authenticating they may be authenticating
Perfect
I may have authenticated you may have authenticated he may have authenticated we may have authenticated you may have authenticated they may have authenticated
V-ing perfect
I may have been authenticating you may have been authenticating he may have been authenticating we may have been authenticating you may have been authenticating they may have been authenticating
Negation
Simple form
I may not authenticate you may not authenticate he may not authenticate we may not authenticate you may not authenticate they may not authenticate
V-ing form
I may not be authenticating you may not be authenticating he may not be authenticating we may not be authenticating you may not be authenticating they may not be authenticating
Perfect
I may not have authenticated you may not have authenticated he may not have authenticated we may not have authenticated you may not have authenticated they may not have authenticated
V-ing perfect
I may not have been authenticating you may not have been authenticating he may not have been authenticating we may not have been authenticating you may not have been authenticating they may not have been authenticating
Interrogative form
Simple form
may I authenticate? may you authenticate? may he authenticate? may we authenticate? may you authenticate? may they authenticate?
V-ing form
may I be authenticating? may you be authenticating? may he be authenticating? may we be authenticating? may you be authenticating? may they be authenticating?
Perfect
may I have authenticated? may you have authenticated? may he have authenticated? may we have authenticated? may you have authenticated? may they have authenticated?
V-ing perfect
may I have been authenticating? may you have been authenticating? may he have been authenticating? may we have been authenticating? may you have been authenticating? may they have been authenticating?
Interro-negative form
Simple form
may I not authenticate? may you not authenticate? may he not authenticate? may we not authenticate? may you not authenticate? may they not authenticate?
V-ing form
may I not be authenticating? may you not be authenticating? may he not be authenticating? may we not be authenticating? may you not be authenticating? may they not be authenticating?
Perfect
may I not have authenticated? may you not have authenticated? may he not have authenticated? may we not have authenticated? may you not have authenticated? may they not have authenticated?
V-ing perfect
may I not have been authenticating? may you not have been authenticating? may he not have been authenticating? may we not have been authenticating? may you not have been authenticating? may they not have been authenticating?