could thumb
Verbe régulier : thumb - thumbed- thumbed
Traduction française : feuilleter - (US) faire du stop ou de l'auto-stop thumb 

Affirmation 	
Forme simple 	Forme en V-ing 	Perfect 	Perfect en V-ing 	
I could thumb
you could thumb
she could thumb
we could thumb
you could thumb
they could thumb 	I could be thumbing
you could be thumbing
she could be thumbing
we could be thumbing
you could be thumbing
they could be thumbing	I could have thumbed
you could have thumbed
she could have thumbed
we could have thumbed
you could have thumbed
they could have thumbed	I could have been thumbing
you could have been thumbing
she could have been thumbing
we could have been thumbing
you could have been thumbing
they could have been thumbing	

Négation 	
Forme simple 	Forme en V-ing 	Perfect 	Perfect en V-ing 	
I couldn't thumb
you couldn't thumb
she couldn't thumb
we couldn't thumb
you couldn't thumb
they couldn't thumb 	I couldn't be thumbing
you couldn't be thumbing
she couldn't be thumbing
we couldn't be thumbing
you couldn't be thumbing
they couldn't be thumbing	I couldn't have thumbed
you couldn't have thumbed
she couldn't have thumbed
we couldn't have thumbed
you couldn't have thumbed
they couldn't have thumbed	I couldn't have been thumbing
you couldn't have been thumbing
she couldn't have been thumbing
we couldn't have been thumbing
you couldn't have been thumbing
they couldn't have been thumbing	

Forme interrogative 	
Forme simple 	Forme en V-ing 	Perfect 	Perfect en V-ing 	
could I thumb?
could you thumb?
could she thumb?
could we thumb?
could you thumb?
could they thumb? 	could I be thumbing?
could you be thumbing?
could she be thumbing?
could we be thumbing?
could you be thumbing?
could they be thumbing? 	could I have thumbed?
could you have thumbed?
could she have thumbed?
could we have thumbed?
could you have thumbed?
could they have thumbed? 	could I have been thumbing?
could you have been thumbing?
could she have been thumbing?
could we have been thumbing?
could you have been thumbing?
could they have been thumbing? 	

Forme interro-négative 	
Forme simple 	Forme en V-ing 	Perfect 	Perfect en V-ing 	
couldn't I thumb?
couldn't you thumb?
couldn't she thumb?
couldn't we thumb?
couldn't you thumb?
couldn't they thumb? 	couldn't I be thumbing?
couldn't you be thumbing?
couldn't she be thumbing?
couldn't we be thumbing?
couldn't you be thumbing?
couldn't they be thumbing? 	couldn't I have thumbed?
couldn't you have thumbed?
couldn't she have thumbed?
couldn't we have thumbed?
couldn't you have thumbed?
couldn't they have thumbed? 	couldn't I have been thumbing?
couldn't you have been thumbing?
couldn't she have been thumbing?
couldn't we have been thumbing?
couldn't you have been thumbing?
couldn't they have been thumbing?