English verb conjugation
COULD WHIRL

Regular verb: whirl - whirled - whirled

Affirmation

Simple form	V-ing form
I could whirl you could whirl she could whirl we could whirl you could whirl they could whirl	I could be whirling you could be whirling she could be whirling we could be whirling you could be whirling they could be whirling
Perfect	V-ing perfect
I could have whirled you could have whirled she could have whirled we could have whirled you could have whirled they could have whirled	I could have been whirling you could have been whirling she could have been whirling we could have been whirling you could have been whirling they could have been whirling

Negation

Simple form	V-ing form
I couldn't whirl you couldn't whirl she couldn't whirl we couldn't whirl you couldn't whirl they couldn't whirl	I couldn't be whirling you couldn't be whirling she couldn't be whirling we couldn't be whirling you couldn't be whirling they couldn't be whirling
Perfect	V-ing perfect
I couldn't have whirled you couldn't have whirled she couldn't have whirled we couldn't have whirled you couldn't have whirled they couldn't have whirled	I couldn't have been whirling you couldn't have been whirling she couldn't have been whirling we couldn't have been whirling you couldn't have been whirling they couldn't have been whirling

Interrogative form

Simple form	V-ing form
could I whirl? could you whirl? could she whirl? could we whirl? could you whirl? could they whirl?	could I be whirling? could you be whirling? could she be whirling? could we be whirling? could you be whirling? could they be whirling?
Perfect	V-ing perfect
could I have whirled? could you have whirled? could she have whirled? could we have whirled? could you have whirled? could they have whirled?	could I have been whirling? could you have been whirling? could she have been whirling? could we have been whirling? could you have been whirling? could they have been whirling?

Interro-negative form

Simple form	V-ing form
couldn't I whirl? couldn't you whirl? couldn't she whirl? couldn't we whirl? couldn't you whirl? couldn't they whirl?	couldn't I be whirling? couldn't you be whirling? couldn't she be whirling? couldn't we be whirling? couldn't you be whirling? couldn't they be whirling?
Perfect	V-ing perfect
couldn't I have whirled? couldn't you have whirled? couldn't she have whirled? couldn't we have whirled? couldn't you have whirled? couldn't they have whirled?	couldn't I have been whirling? couldn't you have been whirling? couldn't she have been whirling? couldn't we have been whirling? couldn't you have been whirling? couldn't they have been whirling?