could prestress
Verbe régulier : prestress - prestressed- prestressed

Affirmation 	
Forme simple 	Forme en V-ing 	Perfect 	Perfect en V-ing 	
I could prestress
you could prestress
she could prestress
we could prestress
you could prestress
they could prestress 	I could be prestressing
you could be prestressing
she could be prestressing
we could be prestressing
you could be prestressing
they could be prestressing	I could have prestressed
you could have prestressed
she could have prestressed
we could have prestressed
you could have prestressed
they could have prestressed	I could have been prestressing
you could have been prestressing
she could have been prestressing
we could have been prestressing
you could have been prestressing
they could have been prestressing	

Négation 	
Forme simple 	Forme en V-ing 	Perfect 	Perfect en V-ing 	
I couldn't prestress
you couldn't prestress
she couldn't prestress
we couldn't prestress
you couldn't prestress
they couldn't prestress 	I couldn't be prestressing
you couldn't be prestressing
she couldn't be prestressing
we couldn't be prestressing
you couldn't be prestressing
they couldn't be prestressing	I couldn't have prestressed
you couldn't have prestressed
she couldn't have prestressed
we couldn't have prestressed
you couldn't have prestressed
they couldn't have prestressed	I couldn't have been prestressing
you couldn't have been prestressing
she couldn't have been prestressing
we couldn't have been prestressing
you couldn't have been prestressing
they couldn't have been prestressing	

Forme interrogative 	
Forme simple 	Forme en V-ing 	Perfect 	Perfect en V-ing 	
could I prestress?
could you prestress?
could she prestress?
could we prestress?
could you prestress?
could they prestress? 	could I be prestressing?
could you be prestressing?
could she be prestressing?
could we be prestressing?
could you be prestressing?
could they be prestressing? 	could I have prestressed?
could you have prestressed?
could she have prestressed?
could we have prestressed?
could you have prestressed?
could they have prestressed? 	could I have been prestressing?
could you have been prestressing?
could she have been prestressing?
could we have been prestressing?
could you have been prestressing?
could they have been prestressing? 	

Forme interro-négative 	
Forme simple 	Forme en V-ing 	Perfect 	Perfect en V-ing 	
couldn't I prestress?
couldn't you prestress?
couldn't she prestress?
couldn't we prestress?
couldn't you prestress?
couldn't they prestress? 	couldn't I be prestressing?
couldn't you be prestressing?
couldn't she be prestressing?
couldn't we be prestressing?
couldn't you be prestressing?
couldn't they be prestressing? 	couldn't I have prestressed?
couldn't you have prestressed?
couldn't she have prestressed?
couldn't we have prestressed?
couldn't you have prestressed?
couldn't they have prestressed? 	couldn't I have been prestressing?
couldn't you have been prestressing?
couldn't she have been prestressing?
couldn't we have been prestressing?
couldn't you have been prestressing?
couldn't they have been prestressing?