English verb conjugation
CAN FLOSS

Regular verb: floss - flossed - flossed

Affirmation

Simple form	V-ing form
I can floss you can floss he can floss we can floss you can floss they can floss	I can be flossing you can be flossing he can be flossing we can be flossing you can be flossing they can be flossing
Perfect	V-ing perfect
I can have flossed you can have flossed he can have flossed we can have flossed you can have flossed they can have flossed	I can have been flossing you can have been flossing he can have been flossing we can have been flossing you can have been flossing they can have been flossing

Negation

Simple form	V-ing form
I can't floss you can't floss he can't floss we can't floss you can't floss they can't floss	I can't be flossing you can't be flossing he can't be flossing we can't be flossing you can't be flossing they can't be flossing
Perfect	V-ing perfect
I can't have flossed you can't have flossed he can't have flossed we can't have flossed you can't have flossed they can't have flossed	I can't have been flossing you can't have been flossing he can't have been flossing we can't have been flossing you can't have been flossing they can't have been flossing

Interrogative form

Simple form	V-ing form
can I floss? can you floss? can he floss? can we floss? can you floss? can they floss?	can I be flossing? can you be flossing? can he be flossing? can we be flossing? can you be flossing? can they be flossing?
Perfect	V-ing perfect
can I have flossed? can you have flossed? can he have flossed? can we have flossed? can you have flossed? can they have flossed?	can I have been flossing? can you have been flossing? can he have been flossing? can we have been flossing? can you have been flossing? can they have been flossing?

Interro-negative form

Simple form	V-ing form
can't I floss? can't you floss? can't he floss? can't we floss? can't you floss? can't they floss?	can't I be flossing? can't you be flossing? can't he be flossing? can't we be flossing? can't you be flossing? can't they be flossing?
Perfect	V-ing perfect
can't I have flossed? can't you have flossed? can't he have flossed? can't we have flossed? can't you have flossed? can't they have flossed?	can't I have been flossing? can't you have been flossing? can't he have been flossing? can't we have been flossing? can't you have been flossing? can't they have been flossing?