could doubt doubt doubt doubt
Verbe régulier : doubt doubt doubt doubt - doubt doubt doubt doubted- doubt doubt doubt doubted

, ce verbe peut ne pas exister, la conjugaison est donnée à titre d'exemple.

Affirmation 	
Forme simple 	Forme en V-ing 	Perfect 	Perfect en V-ing 	
I could doubt doubt doubt doubt
you could doubt doubt doubt doubt
he could doubt doubt doubt doubt
we could doubt doubt doubt doubt
you could doubt doubt doubt doubt
they could doubt doubt doubt doubt 	I could be doubt doubt doubt doubting
you could be doubt doubt doubt doubting
he could be doubt doubt doubt doubting
we could be doubt doubt doubt doubting
you could be doubt doubt doubt doubting
they could be doubt doubt doubt doubting	I could have doubt doubt doubt doubted
you could have doubt doubt doubt doubted
he could have doubt doubt doubt doubted
we could have doubt doubt doubt doubted
you could have doubt doubt doubt doubted
they could have doubt doubt doubt doubted	I could have been doubt doubt doubt doubting
you could have been doubt doubt doubt doubting
he could have been doubt doubt doubt doubting
we could have been doubt doubt doubt doubting
you could have been doubt doubt doubt doubting
they could have been doubt doubt doubt doubting	

Négation 	
Forme simple 	Forme en V-ing 	Perfect 	Perfect en V-ing 	
I couldn't doubt doubt doubt doubt
you couldn't doubt doubt doubt doubt
he couldn't doubt doubt doubt doubt
we couldn't doubt doubt doubt doubt
you couldn't doubt doubt doubt doubt
they couldn't doubt doubt doubt doubt 	I couldn't be doubt doubt doubt doubting
you couldn't be doubt doubt doubt doubting
he couldn't be doubt doubt doubt doubting
we couldn't be doubt doubt doubt doubting
you couldn't be doubt doubt doubt doubting
they couldn't be doubt doubt doubt doubting	I couldn't have doubt doubt doubt doubted
you couldn't have doubt doubt doubt doubted
he couldn't have doubt doubt doubt doubted
we couldn't have doubt doubt doubt doubted
you couldn't have doubt doubt doubt doubted
they couldn't have doubt doubt doubt doubted	I couldn't have been doubt doubt doubt doubting
you couldn't have been doubt doubt doubt doubting
he couldn't have been doubt doubt doubt doubting
we couldn't have been doubt doubt doubt doubting
you couldn't have been doubt doubt doubt doubting
they couldn't have been doubt doubt doubt doubting	

Forme interrogative 	
Forme simple 	Forme en V-ing 	Perfect 	Perfect en V-ing 	
could I doubt doubt doubt doubt?
could you doubt doubt doubt doubt?
could he doubt doubt doubt doubt?
could we doubt doubt doubt doubt?
could you doubt doubt doubt doubt?
could they doubt doubt doubt doubt? 	could I be doubt doubt doubt doubting?
could you be doubt doubt doubt doubting?
could he be doubt doubt doubt doubting?
could we be doubt doubt doubt doubting?
could you be doubt doubt doubt doubting?
could they be doubt doubt doubt doubting? 	could I have doubt doubt doubt doubted?
could you have doubt doubt doubt doubted?
could he have doubt doubt doubt doubted?
could we have doubt doubt doubt doubted?
could you have doubt doubt doubt doubted?
could they have doubt doubt doubt doubted? 	could I have been doubt doubt doubt doubting?
could you have been doubt doubt doubt doubting?
could he have been doubt doubt doubt doubting?
could we have been doubt doubt doubt doubting?
could you have been doubt doubt doubt doubting?
could they have been doubt doubt doubt doubting? 	

Forme interro-négative 	
Forme simple 	Forme en V-ing 	Perfect 	Perfect en V-ing 	
couldn't I doubt doubt doubt doubt?
couldn't you doubt doubt doubt doubt?
couldn't he doubt doubt doubt doubt?
couldn't we doubt doubt doubt doubt?
couldn't you doubt doubt doubt doubt?
couldn't they doubt doubt doubt doubt? 	couldn't I be doubt doubt doubt doubting?
couldn't you be doubt doubt doubt doubting?
couldn't he be doubt doubt doubt doubting?
couldn't we be doubt doubt doubt doubting?
couldn't you be doubt doubt doubt doubting?
couldn't they be doubt doubt doubt doubting? 	couldn't I have doubt doubt doubt doubted?
couldn't you have doubt doubt doubt doubted?
couldn't he have doubt doubt doubt doubted?
couldn't we have doubt doubt doubt doubted?
couldn't you have doubt doubt doubt doubted?
couldn't they have doubt doubt doubt doubted? 	couldn't I have been doubt doubt doubt doubting?
couldn't you have been doubt doubt doubt doubting?
couldn't he have been doubt doubt doubt doubting?
couldn't we have been doubt doubt doubt doubting?
couldn't you have been doubt doubt doubt doubting?
couldn't they have been doubt doubt doubt doubting?