could prefertilise
Verbe régulier : prefertilise - prefertilised- prefertilised

Affirmation 	
Forme simple 	Forme en V-ing 	Perfect 	Perfect en V-ing 	
I could prefertilise
you could prefertilise
he could prefertilise
we could prefertilise
you could prefertilise
they could prefertilise 	I could be prefertilising
you could be prefertilising
he could be prefertilising
we could be prefertilising
you could be prefertilising
they could be prefertilising	I could have prefertilised
you could have prefertilised
he could have prefertilised
we could have prefertilised
you could have prefertilised
they could have prefertilised	I could have been prefertilising
you could have been prefertilising
he could have been prefertilising
we could have been prefertilising
you could have been prefertilising
they could have been prefertilising	

Négation 	
Forme simple 	Forme en V-ing 	Perfect 	Perfect en V-ing 	
I could not prefertilise
you could not prefertilise
he could not prefertilise
we could not prefertilise
you could not prefertilise
they could not prefertilise 	I could not be prefertilising
you could not be prefertilising
he could not be prefertilising
we could not be prefertilising
you could not be prefertilising
they could not be prefertilising	I could not have prefertilised
you could not have prefertilised
he could not have prefertilised
we could not have prefertilised
you could not have prefertilised
they could not have prefertilised	I could not have been prefertilising
you could not have been prefertilising
he could not have been prefertilising
we could not have been prefertilising
you could not have been prefertilising
they could not have been prefertilising	

Forme interrogative 	
Forme simple 	Forme en V-ing 	Perfect 	Perfect en V-ing 	
could I prefertilise?
could you prefertilise?
could he prefertilise?
could we prefertilise?
could you prefertilise?
could they prefertilise? 	could I be prefertilising?
could you be prefertilising?
could he be prefertilising?
could we be prefertilising?
could you be prefertilising?
could they be prefertilising? 	could I have prefertilised?
could you have prefertilised?
could he have prefertilised?
could we have prefertilised?
could you have prefertilised?
could they have prefertilised? 	could I have been prefertilising?
could you have been prefertilising?
could he have been prefertilising?
could we have been prefertilising?
could you have been prefertilising?
could they have been prefertilising? 	

Forme interro-négative 	
Forme simple 	Forme en V-ing 	Perfect 	Perfect en V-ing 	
could I not prefertilise?
could you not prefertilise?
could he not prefertilise?
could we not prefertilise?
could you not prefertilise?
could they not prefertilise? 	could I not be prefertilising?
could you not be prefertilising?
could he not be prefertilising?
could we not be prefertilising?
could you not be prefertilising?
could they not be prefertilising? 	could I not have prefertilised?
could you not have prefertilised?
could he not have prefertilised?
could we not have prefertilised?
could you not have prefertilised?
could they not have prefertilised? 	could I not have been prefertilising?
could you not have been prefertilising?
could he not have been prefertilising?
could we not have been prefertilising?
could you not have been prefertilising?
could they not have been prefertilising?