Warning, this verb may not exist. Conjugation is given as example.
Affirmation
Simple form
I may knock knock you may knock knock he may knock knock we may knock knock you may knock knock they may knock knock
V-ing form
I may be knock knocking you may be knock knocking he may be knock knocking we may be knock knocking you may be knock knocking they may be knock knocking
Perfect
I may have knock knocked you may have knock knocked he may have knock knocked we may have knock knocked you may have knock knocked they may have knock knocked
V-ing perfect
I may have been knock knocking you may have been knock knocking he may have been knock knocking we may have been knock knocking you may have been knock knocking they may have been knock knocking
Negation
Simple form
I may not knock knock you may not knock knock he may not knock knock we may not knock knock you may not knock knock they may not knock knock
V-ing form
I may not be knock knocking you may not be knock knocking he may not be knock knocking we may not be knock knocking you may not be knock knocking they may not be knock knocking
Perfect
I may not have knock knocked you may not have knock knocked he may not have knock knocked we may not have knock knocked you may not have knock knocked they may not have knock knocked
V-ing perfect
I may not have been knock knocking you may not have been knock knocking he may not have been knock knocking we may not have been knock knocking you may not have been knock knocking they may not have been knock knocking
Interrogative form
Simple form
may I knock knock? may you knock knock? may he knock knock? may we knock knock? may you knock knock? may they knock knock?
V-ing form
may I be knock knocking? may you be knock knocking? may he be knock knocking? may we be knock knocking? may you be knock knocking? may they be knock knocking?
Perfect
may I have knock knocked? may you have knock knocked? may he have knock knocked? may we have knock knocked? may you have knock knocked? may they have knock knocked?
V-ing perfect
may I have been knock knocking? may you have been knock knocking? may he have been knock knocking? may we have been knock knocking? may you have been knock knocking? may they have been knock knocking?
Interro-negative form
Simple form
may I not knock knock? may you not knock knock? may he not knock knock? may we not knock knock? may you not knock knock? may they not knock knock?
V-ing form
may I not be knock knocking? may you not be knock knocking? may he not be knock knocking? may we not be knock knocking? may you not be knock knocking? may they not be knock knocking?
Perfect
may I not have knock knocked? may you not have knock knocked? may he not have knock knocked? may we not have knock knocked? may you not have knock knocked? may they not have knock knocked?
V-ing perfect
may I not have been knock knocking? may you not have been knock knocking? may he not have been knock knocking? may we not have been knock knocking? may you not have been knock knocking? may they not have been knock knocking?