must presterilise
Regular verb: presterilise - presterilised- presterilised

Affirmation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I must presterilise
you must presterilise
he must presterilise
we must presterilise
you must presterilise
they must presterilise 	I must be presterilising
you must be presterilising
he must be presterilising
we must be presterilising
you must be presterilising
they must be presterilising	I must have presterilised
you must have presterilised
he must have presterilised
we must have presterilised
you must have presterilised
they must have presterilised	I must have been presterilising
you must have been presterilising
he must have been presterilising
we must have been presterilising
you must have been presterilising
they must have been presterilising	

Negation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I mustn't presterilise
you mustn't presterilise
he mustn't presterilise
we mustn't presterilise
you mustn't presterilise
they mustn't presterilise 	I mustn't be presterilising
you mustn't be presterilising
he mustn't be presterilising
we mustn't be presterilising
you mustn't be presterilising
they mustn't be presterilising	I mustn't have presterilised
you mustn't have presterilised
he mustn't have presterilised
we mustn't have presterilised
you mustn't have presterilised
they mustn't have presterilised	I mustn't have been presterilising
you mustn't have been presterilising
he mustn't have been presterilising
we mustn't have been presterilising
you mustn't have been presterilising
they mustn't have been presterilising	

Interrogative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
must I presterilise?
must you presterilise?
must he presterilise?
must we presterilise?
must you presterilise?
must they presterilise? 	must I be presterilising?
must you be presterilising?
must he be presterilising?
must we be presterilising?
must you be presterilising?
must they be presterilising? 	must I have presterilised?
must you have presterilised?
must he have presterilised?
must we have presterilised?
must you have presterilised?
must they have presterilised? 	must I have been presterilising?
must you have been presterilising?
must he have been presterilising?
must we have been presterilising?
must you have been presterilising?
must they have been presterilising? 	

Interro-negative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
mustn't I presterilise?
mustn't you presterilise?
mustn't he presterilise?
mustn't we presterilise?
mustn't you presterilise?
mustn't they presterilise? 	mustn't I be presterilising?
mustn't you be presterilising?
mustn't he be presterilising?
mustn't we be presterilising?
mustn't you be presterilising?
mustn't they be presterilising? 	mustn't I have presterilised?
mustn't you have presterilised?
mustn't he have presterilised?
mustn't we have presterilised?
mustn't you have presterilised?
mustn't they have presterilised? 	mustn't I have been presterilising?
mustn't you have been presterilising?
mustn't he have been presterilising?
mustn't we have been presterilising?
mustn't you have been presterilising?
mustn't they have been presterilising?