English verb conjugation
COULD WALTZ

Regular verb: waltz - waltzed - waltzed

Affirmation

Simple form	V-ing form
I could waltz you could waltz he could waltz we could waltz you could waltz they could waltz	I could be waltzing you could be waltzing he could be waltzing we could be waltzing you could be waltzing they could be waltzing
Perfect	V-ing perfect
I could have waltzed you could have waltzed he could have waltzed we could have waltzed you could have waltzed they could have waltzed	I could have been waltzing you could have been waltzing he could have been waltzing we could have been waltzing you could have been waltzing they could have been waltzing

Negation

Simple form	V-ing form
I couldn't waltz you couldn't waltz he couldn't waltz we couldn't waltz you couldn't waltz they couldn't waltz	I couldn't be waltzing you couldn't be waltzing he couldn't be waltzing we couldn't be waltzing you couldn't be waltzing they couldn't be waltzing
Perfect	V-ing perfect
I couldn't have waltzed you couldn't have waltzed he couldn't have waltzed we couldn't have waltzed you couldn't have waltzed they couldn't have waltzed	I couldn't have been waltzing you couldn't have been waltzing he couldn't have been waltzing we couldn't have been waltzing you couldn't have been waltzing they couldn't have been waltzing

Interrogative form

Simple form	V-ing form
could I waltz? could you waltz? could he waltz? could we waltz? could you waltz? could they waltz?	could I be waltzing? could you be waltzing? could he be waltzing? could we be waltzing? could you be waltzing? could they be waltzing?
Perfect	V-ing perfect
could I have waltzed? could you have waltzed? could he have waltzed? could we have waltzed? could you have waltzed? could they have waltzed?	could I have been waltzing? could you have been waltzing? could he have been waltzing? could we have been waltzing? could you have been waltzing? could they have been waltzing?

Interro-negative form

Simple form	V-ing form
couldn't I waltz? couldn't you waltz? couldn't he waltz? couldn't we waltz? couldn't you waltz? couldn't they waltz?	couldn't I be waltzing? couldn't you be waltzing? couldn't he be waltzing? couldn't we be waltzing? couldn't you be waltzing? couldn't they be waltzing?
Perfect	V-ing perfect
couldn't I have waltzed? couldn't you have waltzed? couldn't he have waltzed? couldn't we have waltzed? couldn't you have waltzed? couldn't they have waltzed?	couldn't I have been waltzing? couldn't you have been waltzing? couldn't he have been waltzing? couldn't we have been waltzing? couldn't you have been waltzing? couldn't they have been waltzing?