can prealter
Verbe régulier : prealter - prealtered- prealtered

Affirmation 	
Forme simple 	Forme en V-ing 	Perfect 	Perfect en V-ing 	
I can prealter
you can prealter
she can prealter
we can prealter
you can prealter
they can prealter 	I can be prealtering
you can be prealtering
she can be prealtering
we can be prealtering
you can be prealtering
they can be prealtering	I can have prealtered
you can have prealtered
she can have prealtered
we can have prealtered
you can have prealtered
they can have prealtered	I can have been prealtering
you can have been prealtering
she can have been prealtering
we can have been prealtering
you can have been prealtering
they can have been prealtering	

Négation 	
Forme simple 	Forme en V-ing 	Perfect 	Perfect en V-ing 	
I cannot prealter
you cannot prealter
she cannot prealter
we cannot prealter
you cannot prealter
they cannot prealter 	I cannot be prealtering
you cannot be prealtering
she cannot be prealtering
we cannot be prealtering
you cannot be prealtering
they cannot be prealtering	I cannot have prealtered
you cannot have prealtered
she cannot have prealtered
we cannot have prealtered
you cannot have prealtered
they cannot have prealtered	I cannot have been prealtering
you cannot have been prealtering
she cannot have been prealtering
we cannot have been prealtering
you cannot have been prealtering
they cannot have been prealtering	

Forme interrogative 	
Forme simple 	Forme en V-ing 	Perfect 	Perfect en V-ing 	
can I prealter?
can you prealter?
can she prealter?
can we prealter?
can you prealter?
can they prealter? 	can I be prealtering?
can you be prealtering?
can she be prealtering?
can we be prealtering?
can you be prealtering?
can they be prealtering? 	can I have prealtered?
can you have prealtered?
can she have prealtered?
can we have prealtered?
can you have prealtered?
can they have prealtered? 	can I have been prealtering?
can you have been prealtering?
can she have been prealtering?
can we have been prealtering?
can you have been prealtering?
can they have been prealtering? 	

Forme interro-négative 	
Forme simple 	Forme en V-ing 	Perfect 	Perfect en V-ing 	
can I not prealter?
can you not prealter?
can she not prealter?
can we not prealter?
can you not prealter?
can they not prealter? 	can I not be prealtering?
can you not be prealtering?
can she not be prealtering?
can we not be prealtering?
can you not be prealtering?
can they not be prealtering? 	can I not have prealtered?
can you not have prealtered?
can she not have prealtered?
can we not have prealtered?
can you not have prealtered?
can they not have prealtered? 	can I not have been prealtering?
can you not have been prealtering?
can she not have been prealtering?
can we not have been prealtering?
can you not have been prealtering?
can they not have been prealtering?