must prickle
Regular verb: prickle - prickled- prickled

Affirmation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I must prickle
you must prickle
he must prickle
we must prickle
you must prickle
they must prickle 	I must be prickling
you must be prickling
he must be prickling
we must be prickling
you must be prickling
they must be prickling	I must have prickled
you must have prickled
he must have prickled
we must have prickled
you must have prickled
they must have prickled	I must have been prickling
you must have been prickling
he must have been prickling
we must have been prickling
you must have been prickling
they must have been prickling	

Negation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I mustn't prickle
you mustn't prickle
he mustn't prickle
we mustn't prickle
you mustn't prickle
they mustn't prickle 	I mustn't be prickling
you mustn't be prickling
he mustn't be prickling
we mustn't be prickling
you mustn't be prickling
they mustn't be prickling	I mustn't have prickled
you mustn't have prickled
he mustn't have prickled
we mustn't have prickled
you mustn't have prickled
they mustn't have prickled	I mustn't have been prickling
you mustn't have been prickling
he mustn't have been prickling
we mustn't have been prickling
you mustn't have been prickling
they mustn't have been prickling	

Interrogative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
must I prickle?
must you prickle?
must he prickle?
must we prickle?
must you prickle?
must they prickle? 	must I be prickling?
must you be prickling?
must he be prickling?
must we be prickling?
must you be prickling?
must they be prickling? 	must I have prickled?
must you have prickled?
must he have prickled?
must we have prickled?
must you have prickled?
must they have prickled? 	must I have been prickling?
must you have been prickling?
must he have been prickling?
must we have been prickling?
must you have been prickling?
must they have been prickling? 	

Interro-negative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
mustn't I prickle?
mustn't you prickle?
mustn't he prickle?
mustn't we prickle?
mustn't you prickle?
mustn't they prickle? 	mustn't I be prickling?
mustn't you be prickling?
mustn't he be prickling?
mustn't we be prickling?
mustn't you be prickling?
mustn't they be prickling? 	mustn't I have prickled?
mustn't you have prickled?
mustn't he have prickled?
mustn't we have prickled?
mustn't you have prickled?
mustn't they have prickled? 	mustn't I have been prickling?
mustn't you have been prickling?
mustn't he have been prickling?
mustn't we have been prickling?
mustn't you have been prickling?
mustn't they have been prickling?