English verb conjugation
CAN FLAP

Regular verb: flap - flapped - flapped

Affirmation

Simple form	V-ing form
I can flap you can flap she can flap we can flap you can flap they can flap	I can be flapping you can be flapping she can be flapping we can be flapping you can be flapping they can be flapping
Perfect	V-ing perfect
I can have flapped you can have flapped she can have flapped we can have flapped you can have flapped they can have flapped	I can have been flapping you can have been flapping she can have been flapping we can have been flapping you can have been flapping they can have been flapping

Negation

Simple form	V-ing form
I cannot flap you cannot flap she cannot flap we cannot flap you cannot flap they cannot flap	I cannot be flapping you cannot be flapping she cannot be flapping we cannot be flapping you cannot be flapping they cannot be flapping
Perfect	V-ing perfect
I cannot have flapped you cannot have flapped she cannot have flapped we cannot have flapped you cannot have flapped they cannot have flapped	I cannot have been flapping you cannot have been flapping she cannot have been flapping we cannot have been flapping you cannot have been flapping they cannot have been flapping

Interrogative form

Simple form	V-ing form
can I flap? can you flap? can she flap? can we flap? can you flap? can they flap?	can I be flapping? can you be flapping? can she be flapping? can we be flapping? can you be flapping? can they be flapping?
Perfect	V-ing perfect
can I have flapped? can you have flapped? can she have flapped? can we have flapped? can you have flapped? can they have flapped?	can I have been flapping? can you have been flapping? can she have been flapping? can we have been flapping? can you have been flapping? can they have been flapping?

Interro-negative form

Simple form	V-ing form
can I not flap? can you not flap? can she not flap? can we not flap? can you not flap? can they not flap?	can I not be flapping? can you not be flapping? can she not be flapping? can we not be flapping? can you not be flapping? can they not be flapping?
Perfect	V-ing perfect
can I not have flapped? can you not have flapped? can she not have flapped? can we not have flapped? can you not have flapped? can they not have flapped?	can I not have been flapping? can you not have been flapping? can she not have been flapping? can we not have been flapping? can you not have been flapping? can they not have been flapping?