must catalyse
Verbe régulier : catalyse - catalysed- catalysed
Traduction française : (UK) catalyser 

Affirmation 	
Forme simple 	Forme en V-ing 	Perfect 	Perfect en V-ing 	
I must catalyse
you must catalyse
he must catalyse
we must catalyse
you must catalyse
they must catalyse 	I must be catalysing
you must be catalysing
he must be catalysing
we must be catalysing
you must be catalysing
they must be catalysing	I must have catalysed
you must have catalysed
he must have catalysed
we must have catalysed
you must have catalysed
they must have catalysed	I must have been catalysing
you must have been catalysing
he must have been catalysing
we must have been catalysing
you must have been catalysing
they must have been catalysing	

Négation 	
Forme simple 	Forme en V-ing 	Perfect 	Perfect en V-ing 	
I mustn't catalyse
you mustn't catalyse
he mustn't catalyse
we mustn't catalyse
you mustn't catalyse
they mustn't catalyse 	I mustn't be catalysing
you mustn't be catalysing
he mustn't be catalysing
we mustn't be catalysing
you mustn't be catalysing
they mustn't be catalysing	I mustn't have catalysed
you mustn't have catalysed
he mustn't have catalysed
we mustn't have catalysed
you mustn't have catalysed
they mustn't have catalysed	I mustn't have been catalysing
you mustn't have been catalysing
he mustn't have been catalysing
we mustn't have been catalysing
you mustn't have been catalysing
they mustn't have been catalysing	

Forme interrogative 	
Forme simple 	Forme en V-ing 	Perfect 	Perfect en V-ing 	
must I catalyse?
must you catalyse?
must he catalyse?
must we catalyse?
must you catalyse?
must they catalyse? 	must I be catalysing?
must you be catalysing?
must he be catalysing?
must we be catalysing?
must you be catalysing?
must they be catalysing? 	must I have catalysed?
must you have catalysed?
must he have catalysed?
must we have catalysed?
must you have catalysed?
must they have catalysed? 	must I have been catalysing?
must you have been catalysing?
must he have been catalysing?
must we have been catalysing?
must you have been catalysing?
must they have been catalysing? 	

Forme interro-négative 	
Forme simple 	Forme en V-ing 	Perfect 	Perfect en V-ing 	
mustn't I catalyse?
mustn't you catalyse?
mustn't he catalyse?
mustn't we catalyse?
mustn't you catalyse?
mustn't they catalyse? 	mustn't I be catalysing?
mustn't you be catalysing?
mustn't he be catalysing?
mustn't we be catalysing?
mustn't you be catalysing?
mustn't they be catalysing? 	mustn't I have catalysed?
mustn't you have catalysed?
mustn't he have catalysed?
mustn't we have catalysed?
mustn't you have catalysed?
mustn't they have catalysed? 	mustn't I have been catalysing?
mustn't you have been catalysing?
mustn't he have been catalysing?
mustn't we have been catalysing?
mustn't you have been catalysing?
mustn't they have been catalysing?