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

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

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

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

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