must whack
Regular verb: whack - whacked- whacked

Affirmation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I must whack
you must whack
she must whack
we must whack
you must whack
they must whack 	I must be whacking
you must be whacking
she must be whacking
we must be whacking
you must be whacking
they must be whacking	I must have whacked
you must have whacked
she must have whacked
we must have whacked
you must have whacked
they must have whacked	I must have been whacking
you must have been whacking
she must have been whacking
we must have been whacking
you must have been whacking
they must have been whacking	

Negation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I must not whack
you must not whack
she must not whack
we must not whack
you must not whack
they must not whack 	I must not be whacking
you must not be whacking
she must not be whacking
we must not be whacking
you must not be whacking
they must not be whacking	I must not have whacked
you must not have whacked
she must not have whacked
we must not have whacked
you must not have whacked
they must not have whacked	I must not have been whacking
you must not have been whacking
she must not have been whacking
we must not have been whacking
you must not have been whacking
they must not have been whacking	

Interrogative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
must I whack?
must you whack?
must she whack?
must we whack?
must you whack?
must they whack? 	must I be whacking?
must you be whacking?
must she be whacking?
must we be whacking?
must you be whacking?
must they be whacking? 	must I have whacked?
must you have whacked?
must she have whacked?
must we have whacked?
must you have whacked?
must they have whacked? 	must I have been whacking?
must you have been whacking?
must she have been whacking?
must we have been whacking?
must you have been whacking?
must they have been whacking? 	

Interro-negative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
must I not whack?
must you not whack?
must she not whack?
must we not whack?
must you not whack?
must they not whack? 	must I not be whacking?
must you not be whacking?
must she not be whacking?
must we not be whacking?
must you not be whacking?
must they not be whacking? 	must I not have whacked?
must you not have whacked?
must she not have whacked?
must we not have whacked?
must you not have whacked?
must they not have whacked? 	must I not have been whacking?
must you not have been whacking?
must she not have been whacking?
must we not have been whacking?
must you not have been whacking?
must they not have been whacking?