must crunch
Regular verb: crunch - crunched- crunched

Affirmation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I must crunch
you must crunch
he must crunch
we must crunch
you must crunch
they must crunch 	I must be crunching
you must be crunching
he must be crunching
we must be crunching
you must be crunching
they must be crunching	I must have crunched
you must have crunched
he must have crunched
we must have crunched
you must have crunched
they must have crunched	I must have been crunching
you must have been crunching
he must have been crunching
we must have been crunching
you must have been crunching
they must have been crunching	

Negation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I mustn't crunch
you mustn't crunch
he mustn't crunch
we mustn't crunch
you mustn't crunch
they mustn't crunch 	I mustn't be crunching
you mustn't be crunching
he mustn't be crunching
we mustn't be crunching
you mustn't be crunching
they mustn't be crunching	I mustn't have crunched
you mustn't have crunched
he mustn't have crunched
we mustn't have crunched
you mustn't have crunched
they mustn't have crunched	I mustn't have been crunching
you mustn't have been crunching
he mustn't have been crunching
we mustn't have been crunching
you mustn't have been crunching
they mustn't have been crunching	

Interrogative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
must I crunch?
must you crunch?
must he crunch?
must we crunch?
must you crunch?
must they crunch? 	must I be crunching?
must you be crunching?
must he be crunching?
must we be crunching?
must you be crunching?
must they be crunching? 	must I have crunched?
must you have crunched?
must he have crunched?
must we have crunched?
must you have crunched?
must they have crunched? 	must I have been crunching?
must you have been crunching?
must he have been crunching?
must we have been crunching?
must you have been crunching?
must they have been crunching? 	

Interro-negative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
mustn't I crunch?
mustn't you crunch?
mustn't he crunch?
mustn't we crunch?
mustn't you crunch?
mustn't they crunch? 	mustn't I be crunching?
mustn't you be crunching?
mustn't he be crunching?
mustn't we be crunching?
mustn't you be crunching?
mustn't they be crunching? 	mustn't I have crunched?
mustn't you have crunched?
mustn't he have crunched?
mustn't we have crunched?
mustn't you have crunched?
mustn't they have crunched? 	mustn't I have been crunching?
mustn't you have been crunching?
mustn't he have been crunching?
mustn't we have been crunching?
mustn't you have been crunching?
mustn't they have been crunching?