English verb conjugation
COULD BUMBLE

Regular verb: bumble - bumbled - bumbled

Affirmation

Simple form	V-ing form
I could bumble you could bumble he could bumble we could bumble you could bumble they could bumble	I could be bumbling you could be bumbling he could be bumbling we could be bumbling you could be bumbling they could be bumbling
Perfect	V-ing perfect
I could have bumbled you could have bumbled he could have bumbled we could have bumbled you could have bumbled they could have bumbled	I could have been bumbling you could have been bumbling he could have been bumbling we could have been bumbling you could have been bumbling they could have been bumbling

Negation

Simple form	V-ing form
I couldn't bumble you couldn't bumble he couldn't bumble we couldn't bumble you couldn't bumble they couldn't bumble	I couldn't be bumbling you couldn't be bumbling he couldn't be bumbling we couldn't be bumbling you couldn't be bumbling they couldn't be bumbling
Perfect	V-ing perfect
I couldn't have bumbled you couldn't have bumbled he couldn't have bumbled we couldn't have bumbled you couldn't have bumbled they couldn't have bumbled	I couldn't have been bumbling you couldn't have been bumbling he couldn't have been bumbling we couldn't have been bumbling you couldn't have been bumbling they couldn't have been bumbling

Interrogative form

Simple form	V-ing form
could I bumble? could you bumble? could he bumble? could we bumble? could you bumble? could they bumble?	could I be bumbling? could you be bumbling? could he be bumbling? could we be bumbling? could you be bumbling? could they be bumbling?
Perfect	V-ing perfect
could I have bumbled? could you have bumbled? could he have bumbled? could we have bumbled? could you have bumbled? could they have bumbled?	could I have been bumbling? could you have been bumbling? could he have been bumbling? could we have been bumbling? could you have been bumbling? could they have been bumbling?

Interro-negative form

Simple form	V-ing form
couldn't I bumble? couldn't you bumble? couldn't he bumble? couldn't we bumble? couldn't you bumble? couldn't they bumble?	couldn't I be bumbling? couldn't you be bumbling? couldn't he be bumbling? couldn't we be bumbling? couldn't you be bumbling? couldn't they be bumbling?
Perfect	V-ing perfect
couldn't I have bumbled? couldn't you have bumbled? couldn't he have bumbled? couldn't we have bumbled? couldn't you have bumbled? couldn't they have bumbled?	couldn't I have been bumbling? couldn't you have been bumbling? couldn't he have been bumbling? couldn't we have been bumbling? couldn't you have been bumbling? couldn't they have been bumbling?