English verb conjugation
COULD FUMBLE

Regular verb: fumble - fumbled - fumbled

Affirmation

Simple form	V-ing form
I could fumble you could fumble he could fumble we could fumble you could fumble they could fumble	I could be fumbling you could be fumbling he could be fumbling we could be fumbling you could be fumbling they could be fumbling
Perfect	V-ing perfect
I could have fumbled you could have fumbled he 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 he could have been fumbling we could have been fumbling you could have been fumbling they could have been fumbling

Negation

Simple form	V-ing form
I couldn't fumble you couldn't fumble he couldn't fumble we couldn't fumble you couldn't fumble they couldn't fumble	I couldn't be fumbling you couldn't be fumbling he couldn't be fumbling we couldn't be fumbling you couldn't be fumbling they couldn't be fumbling
Perfect	V-ing perfect
I couldn't have fumbled you couldn't have fumbled he couldn't have fumbled we couldn't have fumbled you couldn't have fumbled they couldn't have fumbled	I couldn't have been fumbling you couldn't have been fumbling he couldn't have been fumbling we couldn't have been fumbling you couldn't have been fumbling they couldn't have been fumbling

Interrogative form

Simple form	V-ing form
could I fumble? could you fumble? could he fumble? could we fumble? could you fumble? could they fumble?	could I be fumbling? could you be fumbling? could he be fumbling? could we be fumbling? could you be fumbling? could they be fumbling?
Perfect	V-ing perfect
could I have fumbled? could you have fumbled? could he 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 he have been fumbling? could we have been fumbling? could you have been fumbling? could they have been fumbling?

Interro-negative form

Simple form	V-ing form
couldn't I fumble? couldn't you fumble? couldn't he fumble? couldn't we fumble? couldn't you fumble? couldn't they fumble?	couldn't I be fumbling? couldn't you be fumbling? couldn't he be fumbling? couldn't we be fumbling? couldn't you be fumbling? couldn't they be fumbling?
Perfect	V-ing perfect
couldn't I have fumbled? couldn't you have fumbled? couldn't he have fumbled? couldn't we have fumbled? couldn't you have fumbled? couldn't they have fumbled?	couldn't I have been fumbling? couldn't you have been fumbling? couldn't he have been fumbling? couldn't we have been fumbling? couldn't you have been fumbling? couldn't they have been fumbling?