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