could mature
Verbe régulier : mature - matured- matured
Traduction française : mûrir - faire mûrir 

Affirmation 	
Forme simple 	Forme en V-ing 	Perfect 	Perfect en V-ing 	
I could mature
you could mature
he could mature
we could mature
you could mature
they could mature 	I could be maturing
you could be maturing
he could be maturing
we could be maturing
you could be maturing
they could be maturing	I could have matured
you could have matured
he could have matured
we could have matured
you could have matured
they could have matured	I could have been maturing
you could have been maturing
he could have been maturing
we could have been maturing
you could have been maturing
they could have been maturing	

Négation 	
Forme simple 	Forme en V-ing 	Perfect 	Perfect en V-ing 	
I could not mature
you could not mature
he could not mature
we could not mature
you could not mature
they could not mature 	I could not be maturing
you could not be maturing
he could not be maturing
we could not be maturing
you could not be maturing
they could not be maturing	I could not have matured
you could not have matured
he could not have matured
we could not have matured
you could not have matured
they could not have matured	I could not have been maturing
you could not have been maturing
he could not have been maturing
we could not have been maturing
you could not have been maturing
they could not have been maturing	

Forme interrogative 	
Forme simple 	Forme en V-ing 	Perfect 	Perfect en V-ing 	
could I mature?
could you mature?
could he mature?
could we mature?
could you mature?
could they mature? 	could I be maturing?
could you be maturing?
could he be maturing?
could we be maturing?
could you be maturing?
could they be maturing? 	could I have matured?
could you have matured?
could he have matured?
could we have matured?
could you have matured?
could they have matured? 	could I have been maturing?
could you have been maturing?
could he have been maturing?
could we have been maturing?
could you have been maturing?
could they have been maturing? 	

Forme interro-négative 	
Forme simple 	Forme en V-ing 	Perfect 	Perfect en V-ing 	
could I not mature?
could you not mature?
could he not mature?
could we not mature?
could you not mature?
could they not mature? 	could I not be maturing?
could you not be maturing?
could he not be maturing?
could we not be maturing?
could you not be maturing?
could they not be maturing? 	could I not have matured?
could you not have matured?
could he not have matured?
could we not have matured?
could you not have matured?
could they not have matured? 	could I not have been maturing?
could you not have been maturing?
could he not have been maturing?
could we not have been maturing?
could you not have been maturing?
could they not have been maturing?