English verb conjugation
COULD QUICKSTEP

Regular verb: quickstep - quicksteped - quicksteped

Affirmation

Simple form	V-ing form
I could quickstep you could quickstep he could quickstep we could quickstep you could quickstep they could quickstep	I could be quicksteping you could be quicksteping he could be quicksteping we could be quicksteping you could be quicksteping they could be quicksteping
Perfect	V-ing perfect
I could have quicksteped you could have quicksteped he could have quicksteped we could have quicksteped you could have quicksteped they could have quicksteped	I could have been quicksteping you could have been quicksteping he could have been quicksteping we could have been quicksteping you could have been quicksteping they could have been quicksteping

Negation

Simple form	V-ing form
I couldn't quickstep you couldn't quickstep he couldn't quickstep we couldn't quickstep you couldn't quickstep they couldn't quickstep	I couldn't be quicksteping you couldn't be quicksteping he couldn't be quicksteping we couldn't be quicksteping you couldn't be quicksteping they couldn't be quicksteping
Perfect	V-ing perfect
I couldn't have quicksteped you couldn't have quicksteped he couldn't have quicksteped we couldn't have quicksteped you couldn't have quicksteped they couldn't have quicksteped	I couldn't have been quicksteping you couldn't have been quicksteping he couldn't have been quicksteping we couldn't have been quicksteping you couldn't have been quicksteping they couldn't have been quicksteping

Interrogative form

Simple form	V-ing form
could I quickstep? could you quickstep? could he quickstep? could we quickstep? could you quickstep? could they quickstep?	could I be quicksteping? could you be quicksteping? could he be quicksteping? could we be quicksteping? could you be quicksteping? could they be quicksteping?
Perfect	V-ing perfect
could I have quicksteped? could you have quicksteped? could he have quicksteped? could we have quicksteped? could you have quicksteped? could they have quicksteped?	could I have been quicksteping? could you have been quicksteping? could he have been quicksteping? could we have been quicksteping? could you have been quicksteping? could they have been quicksteping?

Interro-negative form

Simple form	V-ing form
couldn't I quickstep? couldn't you quickstep? couldn't he quickstep? couldn't we quickstep? couldn't you quickstep? couldn't they quickstep?	couldn't I be quicksteping? couldn't you be quicksteping? couldn't he be quicksteping? couldn't we be quicksteping? couldn't you be quicksteping? couldn't they be quicksteping?
Perfect	V-ing perfect
couldn't I have quicksteped? couldn't you have quicksteped? couldn't he have quicksteped? couldn't we have quicksteped? couldn't you have quicksteped? couldn't they have quicksteped?	couldn't I have been quicksteping? couldn't you have been quicksteping? couldn't he have been quicksteping? couldn't we have been quicksteping? couldn't you have been quicksteping? couldn't they have been quicksteping?