must betroth
Regular verb: betroth - betrothed- betrothed

Affirmation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I must betroth
you must betroth
he must betroth
we must betroth
you must betroth
they must betroth 	I must be betrothing
you must be betrothing
he must be betrothing
we must be betrothing
you must be betrothing
they must be betrothing	I must have betrothed
you must have betrothed
he must have betrothed
we must have betrothed
you must have betrothed
they must have betrothed	I must have been betrothing
you must have been betrothing
he must have been betrothing
we must have been betrothing
you must have been betrothing
they must have been betrothing	

Negation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I mustn't betroth
you mustn't betroth
he mustn't betroth
we mustn't betroth
you mustn't betroth
they mustn't betroth 	I mustn't be betrothing
you mustn't be betrothing
he mustn't be betrothing
we mustn't be betrothing
you mustn't be betrothing
they mustn't be betrothing	I mustn't have betrothed
you mustn't have betrothed
he mustn't have betrothed
we mustn't have betrothed
you mustn't have betrothed
they mustn't have betrothed	I mustn't have been betrothing
you mustn't have been betrothing
he mustn't have been betrothing
we mustn't have been betrothing
you mustn't have been betrothing
they mustn't have been betrothing	

Interrogative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
must I betroth?
must you betroth?
must he betroth?
must we betroth?
must you betroth?
must they betroth? 	must I be betrothing?
must you be betrothing?
must he be betrothing?
must we be betrothing?
must you be betrothing?
must they be betrothing? 	must I have betrothed?
must you have betrothed?
must he have betrothed?
must we have betrothed?
must you have betrothed?
must they have betrothed? 	must I have been betrothing?
must you have been betrothing?
must he have been betrothing?
must we have been betrothing?
must you have been betrothing?
must they have been betrothing? 	

Interro-negative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
mustn't I betroth?
mustn't you betroth?
mustn't he betroth?
mustn't we betroth?
mustn't you betroth?
mustn't they betroth? 	mustn't I be betrothing?
mustn't you be betrothing?
mustn't he be betrothing?
mustn't we be betrothing?
mustn't you be betrothing?
mustn't they be betrothing? 	mustn't I have betrothed?
mustn't you have betrothed?
mustn't he have betrothed?
mustn't we have betrothed?
mustn't you have betrothed?
mustn't they have betrothed? 	mustn't I have been betrothing?
mustn't you have been betrothing?
mustn't he have been betrothing?
mustn't we have been betrothing?
mustn't you have been betrothing?
mustn't they have been betrothing?