must blackjack
Regular verb: blackjack - blackjacked- blackjacked

Affirmation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I must blackjack
you must blackjack
she must blackjack
we must blackjack
you must blackjack
they must blackjack 	I must be blackjacking
you must be blackjacking
she must be blackjacking
we must be blackjacking
you must be blackjacking
they must be blackjacking	I must have blackjacked
you must have blackjacked
she must have blackjacked
we must have blackjacked
you must have blackjacked
they must have blackjacked	I must have been blackjacking
you must have been blackjacking
she must have been blackjacking
we must have been blackjacking
you must have been blackjacking
they must have been blackjacking	

Negation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I must not blackjack
you must not blackjack
she must not blackjack
we must not blackjack
you must not blackjack
they must not blackjack 	I must not be blackjacking
you must not be blackjacking
she must not be blackjacking
we must not be blackjacking
you must not be blackjacking
they must not be blackjacking	I must not have blackjacked
you must not have blackjacked
she must not have blackjacked
we must not have blackjacked
you must not have blackjacked
they must not have blackjacked	I must not have been blackjacking
you must not have been blackjacking
she must not have been blackjacking
we must not have been blackjacking
you must not have been blackjacking
they must not have been blackjacking	

Interrogative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
must I blackjack?
must you blackjack?
must she blackjack?
must we blackjack?
must you blackjack?
must they blackjack? 	must I be blackjacking?
must you be blackjacking?
must she be blackjacking?
must we be blackjacking?
must you be blackjacking?
must they be blackjacking? 	must I have blackjacked?
must you have blackjacked?
must she have blackjacked?
must we have blackjacked?
must you have blackjacked?
must they have blackjacked? 	must I have been blackjacking?
must you have been blackjacking?
must she have been blackjacking?
must we have been blackjacking?
must you have been blackjacking?
must they have been blackjacking? 	

Interro-negative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
must I not blackjack?
must you not blackjack?
must she not blackjack?
must we not blackjack?
must you not blackjack?
must they not blackjack? 	must I not be blackjacking?
must you not be blackjacking?
must she not be blackjacking?
must we not be blackjacking?
must you not be blackjacking?
must they not be blackjacking? 	must I not have blackjacked?
must you not have blackjacked?
must she not have blackjacked?
must we not have blackjacked?
must you not have blackjacked?
must they not have blackjacked? 	must I not have been blackjacking?
must you not have been blackjacking?
must she not have been blackjacking?
must we not have been blackjacking?
must you not have been blackjacking?
must they not have been blackjacking?