English verb conjugation
COULD TWIRL

Regular verb: twirl - twirled - twirled

Affirmation

Simple form	V-ing form
I could twirl you could twirl he could twirl we could twirl you could twirl they could twirl	I could be twirling you could be twirling he could be twirling we could be twirling you could be twirling they could be twirling
Perfect	V-ing perfect
I could have twirled you could have twirled he could have twirled we could have twirled you could have twirled they could have twirled	I could have been twirling you could have been twirling he could have been twirling we could have been twirling you could have been twirling they could have been twirling

Negation

Simple form	V-ing form
I couldn't twirl you couldn't twirl he couldn't twirl we couldn't twirl you couldn't twirl they couldn't twirl	I couldn't be twirling you couldn't be twirling he couldn't be twirling we couldn't be twirling you couldn't be twirling they couldn't be twirling
Perfect	V-ing perfect
I couldn't have twirled you couldn't have twirled he couldn't have twirled we couldn't have twirled you couldn't have twirled they couldn't have twirled	I couldn't have been twirling you couldn't have been twirling he couldn't have been twirling we couldn't have been twirling you couldn't have been twirling they couldn't have been twirling

Interrogative form

Simple form	V-ing form
could I twirl? could you twirl? could he twirl? could we twirl? could you twirl? could they twirl?	could I be twirling? could you be twirling? could he be twirling? could we be twirling? could you be twirling? could they be twirling?
Perfect	V-ing perfect
could I have twirled? could you have twirled? could he have twirled? could we have twirled? could you have twirled? could they have twirled?	could I have been twirling? could you have been twirling? could he have been twirling? could we have been twirling? could you have been twirling? could they have been twirling?

Interro-negative form

Simple form	V-ing form
couldn't I twirl? couldn't you twirl? couldn't he twirl? couldn't we twirl? couldn't you twirl? couldn't they twirl?	couldn't I be twirling? couldn't you be twirling? couldn't he be twirling? couldn't we be twirling? couldn't you be twirling? couldn't they be twirling?
Perfect	V-ing perfect
couldn't I have twirled? couldn't you have twirled? couldn't he have twirled? couldn't we have twirled? couldn't you have twirled? couldn't they have twirled?	couldn't I have been twirling? couldn't you have been twirling? couldn't he have been twirling? couldn't we have been twirling? couldn't you have been twirling? couldn't they have been twirling?