English verb conjugation
MUST CROSSRUFF

Regular verb: crossruff - crossruffed - crossruffed

Affirmation

Simple form	V-ing form
I must crossruff you must crossruff she must crossruff we must crossruff you must crossruff they must crossruff	I must be crossruffing you must be crossruffing she must be crossruffing we must be crossruffing you must be crossruffing they must be crossruffing
Perfect	V-ing perfect
I must have crossruffed you must have crossruffed she must have crossruffed we must have crossruffed you must have crossruffed they must have crossruffed	I must have been crossruffing you must have been crossruffing she must have been crossruffing we must have been crossruffing you must have been crossruffing they must have been crossruffing

Negation

Simple form	V-ing form
I must not crossruff you must not crossruff she must not crossruff we must not crossruff you must not crossruff they must not crossruff	I must not be crossruffing you must not be crossruffing she must not be crossruffing we must not be crossruffing you must not be crossruffing they must not be crossruffing
Perfect	V-ing perfect
I must not have crossruffed you must not have crossruffed she must not have crossruffed we must not have crossruffed you must not have crossruffed they must not have crossruffed	I must not have been crossruffing you must not have been crossruffing she must not have been crossruffing we must not have been crossruffing you must not have been crossruffing they must not have been crossruffing

Interrogative form

Simple form	V-ing form
must I crossruff? must you crossruff? must she crossruff? must we crossruff? must you crossruff? must they crossruff?	must I be crossruffing? must you be crossruffing? must she be crossruffing? must we be crossruffing? must you be crossruffing? must they be crossruffing?
Perfect	V-ing perfect
must I have crossruffed? must you have crossruffed? must she have crossruffed? must we have crossruffed? must you have crossruffed? must they have crossruffed?	must I have been crossruffing? must you have been crossruffing? must she have been crossruffing? must we have been crossruffing? must you have been crossruffing? must they have been crossruffing?

Interro-negative form

Simple form	V-ing form
must I not crossruff? must you not crossruff? must she not crossruff? must we not crossruff? must you not crossruff? must they not crossruff?	must I not be crossruffing? must you not be crossruffing? must she not be crossruffing? must we not be crossruffing? must you not be crossruffing? must they not be crossruffing?
Perfect	V-ing perfect
must I not have crossruffed? must you not have crossruffed? must she not have crossruffed? must we not have crossruffed? must you not have crossruffed? must they not have crossruffed?	must I not have been crossruffing? must you not have been crossruffing? must she not have been crossruffing? must we not have been crossruffing? must you not have been crossruffing? must they not have been crossruffing?