could preharden
Verbe régulier : preharden - prehardened- prehardened

Affirmation 	
Forme simple 	Forme en V-ing 	Perfect 	Perfect en V-ing 	
I could preharden
you could preharden
she could preharden
we could preharden
you could preharden
they could preharden 	I could be prehardening
you could be prehardening
she could be prehardening
we could be prehardening
you could be prehardening
they could be prehardening	I could have prehardened
you could have prehardened
she could have prehardened
we could have prehardened
you could have prehardened
they could have prehardened	I could have been prehardening
you could have been prehardening
she could have been prehardening
we could have been prehardening
you could have been prehardening
they could have been prehardening	

Négation 	
Forme simple 	Forme en V-ing 	Perfect 	Perfect en V-ing 	
I could not preharden
you could not preharden
she could not preharden
we could not preharden
you could not preharden
they could not preharden 	I could not be prehardening
you could not be prehardening
she could not be prehardening
we could not be prehardening
you could not be prehardening
they could not be prehardening	I could not have prehardened
you could not have prehardened
she could not have prehardened
we could not have prehardened
you could not have prehardened
they could not have prehardened	I could not have been prehardening
you could not have been prehardening
she could not have been prehardening
we could not have been prehardening
you could not have been prehardening
they could not have been prehardening	

Forme interrogative 	
Forme simple 	Forme en V-ing 	Perfect 	Perfect en V-ing 	
could I preharden?
could you preharden?
could she preharden?
could we preharden?
could you preharden?
could they preharden? 	could I be prehardening?
could you be prehardening?
could she be prehardening?
could we be prehardening?
could you be prehardening?
could they be prehardening? 	could I have prehardened?
could you have prehardened?
could she have prehardened?
could we have prehardened?
could you have prehardened?
could they have prehardened? 	could I have been prehardening?
could you have been prehardening?
could she have been prehardening?
could we have been prehardening?
could you have been prehardening?
could they have been prehardening? 	

Forme interro-négative 	
Forme simple 	Forme en V-ing 	Perfect 	Perfect en V-ing 	
could I not preharden?
could you not preharden?
could she not preharden?
could we not preharden?
could you not preharden?
could they not preharden? 	could I not be prehardening?
could you not be prehardening?
could she not be prehardening?
could we not be prehardening?
could you not be prehardening?
could they not be prehardening? 	could I not have prehardened?
could you not have prehardened?
could she not have prehardened?
could we not have prehardened?
could you not have prehardened?
could they not have prehardened? 	could I not have been prehardening?
could you not have been prehardening?
could she not have been prehardening?
could we not have been prehardening?
could you not have been prehardening?
could they not have been prehardening?