must singularise
Regular verb: singularise - singularised- singularised

Affirmation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I must singularise
you must singularise
he must singularise
we must singularise
you must singularise
they must singularise 	I must be singularising
you must be singularising
he must be singularising
we must be singularising
you must be singularising
they must be singularising	I must have singularised
you must have singularised
he must have singularised
we must have singularised
you must have singularised
they must have singularised	I must have been singularising
you must have been singularising
he must have been singularising
we must have been singularising
you must have been singularising
they must have been singularising	

Negation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I mustn't singularise
you mustn't singularise
he mustn't singularise
we mustn't singularise
you mustn't singularise
they mustn't singularise 	I mustn't be singularising
you mustn't be singularising
he mustn't be singularising
we mustn't be singularising
you mustn't be singularising
they mustn't be singularising	I mustn't have singularised
you mustn't have singularised
he mustn't have singularised
we mustn't have singularised
you mustn't have singularised
they mustn't have singularised	I mustn't have been singularising
you mustn't have been singularising
he mustn't have been singularising
we mustn't have been singularising
you mustn't have been singularising
they mustn't have been singularising	

Interrogative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
must I singularise?
must you singularise?
must he singularise?
must we singularise?
must you singularise?
must they singularise? 	must I be singularising?
must you be singularising?
must he be singularising?
must we be singularising?
must you be singularising?
must they be singularising? 	must I have singularised?
must you have singularised?
must he have singularised?
must we have singularised?
must you have singularised?
must they have singularised? 	must I have been singularising?
must you have been singularising?
must he have been singularising?
must we have been singularising?
must you have been singularising?
must they have been singularising? 	

Interro-negative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
mustn't I singularise?
mustn't you singularise?
mustn't he singularise?
mustn't we singularise?
mustn't you singularise?
mustn't they singularise? 	mustn't I be singularising?
mustn't you be singularising?
mustn't he be singularising?
mustn't we be singularising?
mustn't you be singularising?
mustn't they be singularising? 	mustn't I have singularised?
mustn't you have singularised?
mustn't he have singularised?
mustn't we have singularised?
mustn't you have singularised?
mustn't they have singularised? 	mustn't I have been singularising?
mustn't you have been singularising?
mustn't he have been singularising?
mustn't we have been singularising?
mustn't you have been singularising?
mustn't they have been singularising?