English verb conjugation
COULD WALK

Regular verb: walk - walked - walked

Affirmation

Simple form	V-ing form
I could walk you could walk he could walk we could walk you could walk they could walk	I could be walking you could be walking he could be walking we could be walking you could be walking they could be walking
Perfect	V-ing perfect
I could have walked you could have walked he could have walked we could have walked you could have walked they could have walked	I could have been walking you could have been walking he could have been walking we could have been walking you could have been walking they could have been walking

Negation

Simple form	V-ing form
I couldn't walk you couldn't walk he couldn't walk we couldn't walk you couldn't walk they couldn't walk	I couldn't be walking you couldn't be walking he couldn't be walking we couldn't be walking you couldn't be walking they couldn't be walking
Perfect	V-ing perfect
I couldn't have walked you couldn't have walked he couldn't have walked we couldn't have walked you couldn't have walked they couldn't have walked	I couldn't have been walking you couldn't have been walking he couldn't have been walking we couldn't have been walking you couldn't have been walking they couldn't have been walking

Interrogative form

Simple form	V-ing form
could I walk? could you walk? could he walk? could we walk? could you walk? could they walk?	could I be walking? could you be walking? could he be walking? could we be walking? could you be walking? could they be walking?
Perfect	V-ing perfect
could I have walked? could you have walked? could he have walked? could we have walked? could you have walked? could they have walked?	could I have been walking? could you have been walking? could he have been walking? could we have been walking? could you have been walking? could they have been walking?

Interro-negative form

Simple form	V-ing form
couldn't I walk? couldn't you walk? couldn't he walk? couldn't we walk? couldn't you walk? couldn't they walk?	couldn't I be walking? couldn't you be walking? couldn't he be walking? couldn't we be walking? couldn't you be walking? couldn't they be walking?
Perfect	V-ing perfect
couldn't I have walked? couldn't you have walked? couldn't he have walked? couldn't we have walked? couldn't you have walked? couldn't they have walked?	couldn't I have been walking? couldn't you have been walking? couldn't he have been walking? couldn't we have been walking? couldn't you have been walking? couldn't they have been walking?