can thumb
Verbo regular: thumb - thumbed- thumbed

Afirmação 	
Forma simple 	Forma com V-ing 	Perfeito 	Perfeito com V-ing 	
I can thumb
you can thumb
she can thumb
we can thumb
you can thumb
they can thumb 	I can be thumbing
you can be thumbing
she can be thumbing
we can be thumbing
you can be thumbing
they can be thumbing	I can have thumbed
you can have thumbed
she can have thumbed
we can have thumbed
you can have thumbed
they can have thumbed	I can have been thumbing
you can have been thumbing
she can have been thumbing
we can have been thumbing
you can have been thumbing
they can have been thumbing	

Negação 	
Forma simple 	Forma com V-ing 	Perfeito 	Perfeito com V-ing 	
I cannot thumb
you cannot thumb
she cannot thumb
we cannot thumb
you cannot thumb
they cannot thumb 	I cannot be thumbing
you cannot be thumbing
she cannot be thumbing
we cannot be thumbing
you cannot be thumbing
they cannot be thumbing	I cannot have thumbed
you cannot have thumbed
she cannot have thumbed
we cannot have thumbed
you cannot have thumbed
they cannot have thumbed	I cannot have been thumbing
you cannot have been thumbing
she cannot have been thumbing
we cannot have been thumbing
you cannot have been thumbing
they cannot have been thumbing	

Forma interrogativa 	
Forma simple 	Forma com V-ing 	Perfeito 	Perfeito com V-ing 	
can I thumb?
can you thumb?
can she thumb?
can we thumb?
can you thumb?
can they thumb? 	can I be thumbing?
can you be thumbing?
can she be thumbing?
can we be thumbing?
can you be thumbing?
can they be thumbing? 	can I have thumbed?
can you have thumbed?
can she have thumbed?
can we have thumbed?
can you have thumbed?
can they have thumbed? 	can I have been thumbing?
can you have been thumbing?
can she have been thumbing?
can we have been thumbing?
can you have been thumbing?
can they have been thumbing? 	

Forma interro-Negação 	
Forma simple 	Forma com V-ing 	Perfeito 	Perfeito com V-ing 	
can I not thumb?
can you not thumb?
can she not thumb?
can we not thumb?
can you not thumb?
can they not thumb? 	can I not be thumbing?
can you not be thumbing?
can she not be thumbing?
can we not be thumbing?
can you not be thumbing?
can they not be thumbing? 	can I not have thumbed?
can you not have thumbed?
can she not have thumbed?
can we not have thumbed?
can you not have thumbed?
can they not have thumbed? 	can I not have been thumbing?
can you not have been thumbing?
can she not have been thumbing?
can we not have been thumbing?
can you not have been thumbing?
can they not have been thumbing?