could maturate
Verbe régulier : maturate - maturated- maturated

Affirmation 	
Forme simple 	Forme en V-ing 	Perfect 	Perfect en V-ing 	
I could maturate
you could maturate
he could maturate
we could maturate
you could maturate
they could maturate 	I could be maturating
you could be maturating
he could be maturating
we could be maturating
you could be maturating
they could be maturating	I could have maturated
you could have maturated
he could have maturated
we could have maturated
you could have maturated
they could have maturated	I could have been maturating
you could have been maturating
he could have been maturating
we could have been maturating
you could have been maturating
they could have been maturating	

Négation 	
Forme simple 	Forme en V-ing 	Perfect 	Perfect en V-ing 	
I couldn't maturate
you couldn't maturate
he couldn't maturate
we couldn't maturate
you couldn't maturate
they couldn't maturate 	I couldn't be maturating
you couldn't be maturating
he couldn't be maturating
we couldn't be maturating
you couldn't be maturating
they couldn't be maturating	I couldn't have maturated
you couldn't have maturated
he couldn't have maturated
we couldn't have maturated
you couldn't have maturated
they couldn't have maturated	I couldn't have been maturating
you couldn't have been maturating
he couldn't have been maturating
we couldn't have been maturating
you couldn't have been maturating
they couldn't have been maturating	

Forme interrogative 	
Forme simple 	Forme en V-ing 	Perfect 	Perfect en V-ing 	
could I maturate?
could you maturate?
could he maturate?
could we maturate?
could you maturate?
could they maturate? 	could I be maturating?
could you be maturating?
could he be maturating?
could we be maturating?
could you be maturating?
could they be maturating? 	could I have maturated?
could you have maturated?
could he have maturated?
could we have maturated?
could you have maturated?
could they have maturated? 	could I have been maturating?
could you have been maturating?
could he have been maturating?
could we have been maturating?
could you have been maturating?
could they have been maturating? 	

Forme interro-négative 	
Forme simple 	Forme en V-ing 	Perfect 	Perfect en V-ing 	
couldn't I maturate?
couldn't you maturate?
couldn't he maturate?
couldn't we maturate?
couldn't you maturate?
couldn't they maturate? 	couldn't I be maturating?
couldn't you be maturating?
couldn't he be maturating?
couldn't we be maturating?
couldn't you be maturating?
couldn't they be maturating? 	couldn't I have maturated?
couldn't you have maturated?
couldn't he have maturated?
couldn't we have maturated?
couldn't you have maturated?
couldn't they have maturated? 	couldn't I have been maturating?
couldn't you have been maturating?
couldn't he have been maturating?
couldn't we have been maturating?
couldn't you have been maturating?
couldn't they have been maturating?