must strangle
Regular verb: strangle - strangled- strangled

Affirmation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I must strangle
you must strangle
he must strangle
we must strangle
you must strangle
they must strangle 	I must be strangling
you must be strangling
he must be strangling
we must be strangling
you must be strangling
they must be strangling	I must have strangled
you must have strangled
he must have strangled
we must have strangled
you must have strangled
they must have strangled	I must have been strangling
you must have been strangling
he must have been strangling
we must have been strangling
you must have been strangling
they must have been strangling	

Negation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I mustn't strangle
you mustn't strangle
he mustn't strangle
we mustn't strangle
you mustn't strangle
they mustn't strangle 	I mustn't be strangling
you mustn't be strangling
he mustn't be strangling
we mustn't be strangling
you mustn't be strangling
they mustn't be strangling	I mustn't have strangled
you mustn't have strangled
he mustn't have strangled
we mustn't have strangled
you mustn't have strangled
they mustn't have strangled	I mustn't have been strangling
you mustn't have been strangling
he mustn't have been strangling
we mustn't have been strangling
you mustn't have been strangling
they mustn't have been strangling	

Interrogative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
must I strangle?
must you strangle?
must he strangle?
must we strangle?
must you strangle?
must they strangle? 	must I be strangling?
must you be strangling?
must he be strangling?
must we be strangling?
must you be strangling?
must they be strangling? 	must I have strangled?
must you have strangled?
must he have strangled?
must we have strangled?
must you have strangled?
must they have strangled? 	must I have been strangling?
must you have been strangling?
must he have been strangling?
must we have been strangling?
must you have been strangling?
must they have been strangling? 	

Interro-negative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
mustn't I strangle?
mustn't you strangle?
mustn't he strangle?
mustn't we strangle?
mustn't you strangle?
mustn't they strangle? 	mustn't I be strangling?
mustn't you be strangling?
mustn't he be strangling?
mustn't we be strangling?
mustn't you be strangling?
mustn't they be strangling? 	mustn't I have strangled?
mustn't you have strangled?
mustn't he have strangled?
mustn't we have strangled?
mustn't you have strangled?
mustn't they have strangled? 	mustn't I have been strangling?
mustn't you have been strangling?
mustn't he have been strangling?
mustn't we have been strangling?
mustn't you have been strangling?
mustn't they have been strangling?