could thumb
Verbo regolare: thumb - thumbed- thumbed

Affermazione 	
Forma semplice 	Forma con V-ing 	Perfetto 	Perfetto con V-ing 	
I could thumb
you could thumb
he could thumb
we could thumb
you could thumb
they could thumb 	I could be thumbing
you could be thumbing
he could be thumbing
we could be thumbing
you could be thumbing
they could be thumbing	I could have thumbed
you could have thumbed
he 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
he could have been thumbing
we could have been thumbing
you could have been thumbing
they could have been thumbing	

Negazione 	
Forma semplice 	Forma con V-ing 	Perfetto 	Perfetto con V-ing 	
I couldn't thumb
you couldn't thumb
he 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
he 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
he 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
he couldn't have been thumbing
we couldn't have been thumbing
you couldn't have been thumbing
they couldn't have been thumbing	

Forma interrogativa 	
Forma semplice 	Forma con V-ing 	Perfetto 	Perfetto con V-ing 	
could I thumb?
could you thumb?
could he thumb?
could we thumb?
could you thumb?
could they thumb? 	could I be thumbing?
could you be thumbing?
could he be thumbing?
could we be thumbing?
could you be thumbing?
could they be thumbing? 	could I have thumbed?
could you have thumbed?
could he 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 he have been thumbing?
could we have been thumbing?
could you have been thumbing?
could they have been thumbing? 	

Forma interro-negativa 	
Forma semplice 	Forma con V-ing 	Perfetto 	Perfetto con V-ing 	
couldn't I thumb?
couldn't you thumb?
couldn't he 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 he 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 he 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 he have been thumbing?
couldn't we have been thumbing?
couldn't you have been thumbing?
couldn't they have been thumbing?