must crank
Regular verb: crank - cranked- cranked

Affirmation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I must crank
you must crank
he must crank
we must crank
you must crank
they must crank 	I must be cranking
you must be cranking
he must be cranking
we must be cranking
you must be cranking
they must be cranking	I must have cranked
you must have cranked
he must have cranked
we must have cranked
you must have cranked
they must have cranked	I must have been cranking
you must have been cranking
he must have been cranking
we must have been cranking
you must have been cranking
they must have been cranking	

Negation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I mustn't crank
you mustn't crank
he mustn't crank
we mustn't crank
you mustn't crank
they mustn't crank 	I mustn't be cranking
you mustn't be cranking
he mustn't be cranking
we mustn't be cranking
you mustn't be cranking
they mustn't be cranking	I mustn't have cranked
you mustn't have cranked
he mustn't have cranked
we mustn't have cranked
you mustn't have cranked
they mustn't have cranked	I mustn't have been cranking
you mustn't have been cranking
he mustn't have been cranking
we mustn't have been cranking
you mustn't have been cranking
they mustn't have been cranking	

Interrogative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
must I crank?
must you crank?
must he crank?
must we crank?
must you crank?
must they crank? 	must I be cranking?
must you be cranking?
must he be cranking?
must we be cranking?
must you be cranking?
must they be cranking? 	must I have cranked?
must you have cranked?
must he have cranked?
must we have cranked?
must you have cranked?
must they have cranked? 	must I have been cranking?
must you have been cranking?
must he have been cranking?
must we have been cranking?
must you have been cranking?
must they have been cranking? 	

Interro-negative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
mustn't I crank?
mustn't you crank?
mustn't he crank?
mustn't we crank?
mustn't you crank?
mustn't they crank? 	mustn't I be cranking?
mustn't you be cranking?
mustn't he be cranking?
mustn't we be cranking?
mustn't you be cranking?
mustn't they be cranking? 	mustn't I have cranked?
mustn't you have cranked?
mustn't he have cranked?
mustn't we have cranked?
mustn't you have cranked?
mustn't they have cranked? 	mustn't I have been cranking?
mustn't you have been cranking?
mustn't he have been cranking?
mustn't we have been cranking?
mustn't you have been cranking?
mustn't they have been cranking?