English verb conjugation
CAN FLACK

Regular verb: flack - flacked - flacked

Affirmation

Simple form	V-ing form
I can flack you can flack he can flack we can flack you can flack they can flack	I can be flacking you can be flacking he can be flacking we can be flacking you can be flacking they can be flacking
Perfect	V-ing perfect
I can have flacked you can have flacked he can have flacked we can have flacked you can have flacked they can have flacked	I can have been flacking you can have been flacking he can have been flacking we can have been flacking you can have been flacking they can have been flacking

Negation

Simple form	V-ing form
I can't flack you can't flack he can't flack we can't flack you can't flack they can't flack	I can't be flacking you can't be flacking he can't be flacking we can't be flacking you can't be flacking they can't be flacking
Perfect	V-ing perfect
I can't have flacked you can't have flacked he can't have flacked we can't have flacked you can't have flacked they can't have flacked	I can't have been flacking you can't have been flacking he can't have been flacking we can't have been flacking you can't have been flacking they can't have been flacking

Interrogative form

Simple form	V-ing form
can I flack? can you flack? can he flack? can we flack? can you flack? can they flack?	can I be flacking? can you be flacking? can he be flacking? can we be flacking? can you be flacking? can they be flacking?
Perfect	V-ing perfect
can I have flacked? can you have flacked? can he have flacked? can we have flacked? can you have flacked? can they have flacked?	can I have been flacking? can you have been flacking? can he have been flacking? can we have been flacking? can you have been flacking? can they have been flacking?

Interro-negative form

Simple form	V-ing form
can't I flack? can't you flack? can't he flack? can't we flack? can't you flack? can't they flack?	can't I be flacking? can't you be flacking? can't he be flacking? can't we be flacking? can't you be flacking? can't they be flacking?
Perfect	V-ing perfect
can't I have flacked? can't you have flacked? can't he have flacked? can't we have flacked? can't you have flacked? can't they have flacked?	can't I have been flacking? can't you have been flacking? can't he have been flacking? can't we have been flacking? can't you have been flacking? can't they have been flacking?