I can birdie you can birdie he can birdie we can birdie you can birdie they can birdie
V-ing form
I can be birdying you can be birdying he can be birdying we can be birdying you can be birdying they can be birdying
Perfect
I can have birdied you can have birdied he can have birdied we can have birdied you can have birdied they can have birdied
V-ing perfect
I can have been birdying you can have been birdying he can have been birdying we can have been birdying you can have been birdying they can have been birdying
Negation
Simple form
I can't birdie you can't birdie he can't birdie we can't birdie you can't birdie they can't birdie
V-ing form
I can't be birdying you can't be birdying he can't be birdying we can't be birdying you can't be birdying they can't be birdying
Perfect
I can't have birdied you can't have birdied he can't have birdied we can't have birdied you can't have birdied they can't have birdied
V-ing perfect
I can't have been birdying you can't have been birdying he can't have been birdying we can't have been birdying you can't have been birdying they can't have been birdying
Interrogative form
Simple form
can I birdie? can you birdie? can he birdie? can we birdie? can you birdie? can they birdie?
V-ing form
can I be birdying? can you be birdying? can he be birdying? can we be birdying? can you be birdying? can they be birdying?
Perfect
can I have birdied? can you have birdied? can he have birdied? can we have birdied? can you have birdied? can they have birdied?
V-ing perfect
can I have been birdying? can you have been birdying? can he have been birdying? can we have been birdying? can you have been birdying? can they have been birdying?
Interro-negative form
Simple form
can't I birdie? can't you birdie? can't he birdie? can't we birdie? can't you birdie? can't they birdie?
V-ing form
can't I be birdying? can't you be birdying? can't he be birdying? can't we be birdying? can't you be birdying? can't they be birdying?
Perfect
can't I have birdied? can't you have birdied? can't he have birdied? can't we have birdied? can't you have birdied? can't they have birdied?
V-ing perfect
can't I have been birdying? can't you have been birdying? can't he have been birdying? can't we have been birdying? can't you have been birdying? can't they have been birdying?