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 must not guillotine
you must not guillotine
he must not guillotine
we must not guillotine
you must not guillotine
they must not guillotine 	I must not be guillotining
you must not be guillotining
he must not be guillotining
we must not be guillotining
you must not be guillotining
they must not be guillotining	I must not have guillotined
you must not have guillotined
he must not have guillotined
we must not have guillotined
you must not have guillotined
they must not have guillotined	I must not have been guillotining
you must not have been guillotining
he must not have been guillotining
we must not have been guillotining
you must not have been guillotining
they must not 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 	
must I not guillotine?
must you not guillotine?
must he not guillotine?
must we not guillotine?
must you not guillotine?
must they not guillotine? 	must I not be guillotining?
must you not be guillotining?
must he not be guillotining?
must we not be guillotining?
must you not be guillotining?
must they not be guillotining? 	must I not have guillotined?
must you not have guillotined?
must he not have guillotined?
must we not have guillotined?
must you not have guillotined?
must they not have guillotined? 	must I not have been guillotining?
must you not have been guillotining?
must he not have been guillotining?
must we not have been guillotining?
must you not have been guillotining?
must they not have been guillotining?