could fumble
Verbo regular: fumble - fumbled- fumbled

Afirmación 	
Forma simple 	Forma con V-ing 	Perfecto 	Perfecto con V-ing 	
I could fumble
you could fumble
she could fumble
we could fumble
you could fumble
they could fumble 	I could be fumbling
you could be fumbling
she could be fumbling
we could be fumbling
you could be fumbling
they could be fumbling	I could have fumbled
you could have fumbled
she could have fumbled
we could have fumbled
you could have fumbled
they could have fumbled	I could have been fumbling
you could have been fumbling
she could have been fumbling
we could have been fumbling
you could have been fumbling
they could have been fumbling	

Negación 	
Forma simple 	Forma con V-ing 	Perfecto 	Perfecto con V-ing 	
I could not fumble
you could not fumble
she could not fumble
we could not fumble
you could not fumble
they could not fumble 	I could not be fumbling
you could not be fumbling
she could not be fumbling
we could not be fumbling
you could not be fumbling
they could not be fumbling	I could not have fumbled
you could not have fumbled
she could not have fumbled
we could not have fumbled
you could not have fumbled
they could not have fumbled	I could not have been fumbling
you could not have been fumbling
she could not have been fumbling
we could not have been fumbling
you could not have been fumbling
they could not have been fumbling	

Forma interrogativa 	
Forma simple 	Forma con V-ing 	Perfecto 	Perfecto con V-ing 	
could I fumble?
could you fumble?
could she fumble?
could we fumble?
could you fumble?
could they fumble? 	could I be fumbling?
could you be fumbling?
could she be fumbling?
could we be fumbling?
could you be fumbling?
could they be fumbling? 	could I have fumbled?
could you have fumbled?
could she have fumbled?
could we have fumbled?
could you have fumbled?
could they have fumbled? 	could I have been fumbling?
could you have been fumbling?
could she have been fumbling?
could we have been fumbling?
could you have been fumbling?
could they have been fumbling? 	

Forma interro-negativa 	
Forma simple 	Forma con V-ing 	Perfecto 	Perfecto con V-ing 	
could I not fumble?
could you not fumble?
could she not fumble?
could we not fumble?
could you not fumble?
could they not fumble? 	could I not be fumbling?
could you not be fumbling?
could she not be fumbling?
could we not be fumbling?
could you not be fumbling?
could they not be fumbling? 	could I not have fumbled?
could you not have fumbled?
could she not have fumbled?
could we not have fumbled?
could you not have fumbled?
could they not have fumbled? 	could I not have been fumbling?
could you not have been fumbling?
could she not have been fumbling?
could we not have been fumbling?
could you not have been fumbling?
could they not have been fumbling?