English verb conjugation
COULD BIRDIE

Regular verb: birdie - birdied - birdied

Affirmation

Simple form	V-ing form
I could birdie you could birdie she could birdie we could birdie you could birdie they could birdie	I could be birdying you could be birdying she could be birdying we could be birdying you could be birdying they could be birdying
Perfect	V-ing perfect
I could have birdied you could have birdied she could have birdied we could have birdied you could have birdied they could have birdied	I could have been birdying you could have been birdying she could have been birdying we could have been birdying you could have been birdying they could have been birdying

Negation

Simple form	V-ing form
I couldn't birdie you couldn't birdie she couldn't birdie we couldn't birdie you couldn't birdie they couldn't birdie	I couldn't be birdying you couldn't be birdying she couldn't be birdying we couldn't be birdying you couldn't be birdying they couldn't be birdying
Perfect	V-ing perfect
I couldn't have birdied you couldn't have birdied she couldn't have birdied we couldn't have birdied you couldn't have birdied they couldn't have birdied	I couldn't have been birdying you couldn't have been birdying she couldn't have been birdying we couldn't have been birdying you couldn't have been birdying they couldn't have been birdying

Interrogative form

Simple form	V-ing form
could I birdie? could you birdie? could she birdie? could we birdie? could you birdie? could they birdie?	could I be birdying? could you be birdying? could she be birdying? could we be birdying? could you be birdying? could they be birdying?
Perfect	V-ing perfect
could I have birdied? could you have birdied? could she have birdied? could we have birdied? could you have birdied? could they have birdied?	could I have been birdying? could you have been birdying? could she have been birdying? could we have been birdying? could you have been birdying? could they have been birdying?

Interro-negative form

Simple form	V-ing form
couldn't I birdie? couldn't you birdie? couldn't she birdie? couldn't we birdie? couldn't you birdie? couldn't they birdie?	couldn't I be birdying? couldn't you be birdying? couldn't she be birdying? couldn't we be birdying? couldn't you be birdying? couldn't they be birdying?
Perfect	V-ing perfect
couldn't I have birdied? couldn't you have birdied? couldn't she have birdied? couldn't we have birdied? couldn't you have birdied? couldn't they have birdied?	couldn't I have been birdying? couldn't you have been birdying? couldn't she have been birdying? couldn't we have been birdying? couldn't you have been birdying? couldn't they have been birdying?