must blackjack
Regular verb: blackjack - blackjacked- blackjacked

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