must guillotine
Regular verb: guillotine - guillotined- guillotined

Affirmation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I must guillotine
you must guillotine
he must guillotine
we must guillotine
you must guillotine
they must guillotine 	I must be guillotining
you must be guillotining
he must be guillotining
we must be guillotining
you must be guillotining
they must be guillotining	I must have guillotined
you must have guillotined
he must have guillotined
we must have guillotined
you must have guillotined
they must have guillotined	I must have been guillotining
you must have been guillotining
he must have been guillotining
we must have been guillotining
you must have been guillotining
they must have been guillotining	

Negation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I mustn't guillotine
you mustn't guillotine
he mustn't guillotine
we mustn't guillotine
you mustn't guillotine
they mustn't guillotine 	I mustn't be guillotining
you mustn't be guillotining
he mustn't be guillotining
we mustn't be guillotining
you mustn't be guillotining
they mustn't be guillotining	I mustn't have guillotined
you mustn't have guillotined
he mustn't have guillotined
we mustn't have guillotined
you mustn't have guillotined
they mustn't have guillotined	I mustn't have been guillotining
you mustn't have been guillotining
he mustn't have been guillotining
we mustn't have been guillotining
you mustn't have been guillotining
they mustn't have been guillotining	

Interrogative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
must I guillotine?
must you guillotine?
must he guillotine?
must we guillotine?
must you guillotine?
must they guillotine? 	must I be guillotining?
must you be guillotining?
must he be guillotining?
must we be guillotining?
must you be guillotining?
must they be guillotining? 	must I have guillotined?
must you have guillotined?
must he have guillotined?
must we have guillotined?
must you have guillotined?
must they have guillotined? 	must I have been guillotining?
must you have been guillotining?
must he have been guillotining?
must we have been guillotining?
must you have been guillotining?
must they have been guillotining? 	

Interro-negative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
mustn't I guillotine?
mustn't you guillotine?
mustn't he guillotine?
mustn't we guillotine?
mustn't you guillotine?
mustn't they guillotine? 	mustn't I be guillotining?
mustn't you be guillotining?
mustn't he be guillotining?
mustn't we be guillotining?
mustn't you be guillotining?
mustn't they be guillotining? 	mustn't I have guillotined?
mustn't you have guillotined?
mustn't he have guillotined?
mustn't we have guillotined?
mustn't you have guillotined?
mustn't they have guillotined? 	mustn't I have been guillotining?
mustn't you have been guillotining?
mustn't he have been guillotining?
mustn't we have been guillotining?
mustn't you have been guillotining?
mustn't they have been guillotining?