English verb conjugation
CAN COARSEN

Regular verb: coarsen - coarsened - coarsened

Affirmation

Simple form	V-ing form
I can coarsen you can coarsen he can coarsen we can coarsen you can coarsen they can coarsen	I can be coarsening you can be coarsening he can be coarsening we can be coarsening you can be coarsening they can be coarsening
Perfect	V-ing perfect
I can have coarsened you can have coarsened he can have coarsened we can have coarsened you can have coarsened they can have coarsened	I can have been coarsening you can have been coarsening he can have been coarsening we can have been coarsening you can have been coarsening they can have been coarsening

Negation

Simple form	V-ing form
I can't coarsen you can't coarsen he can't coarsen we can't coarsen you can't coarsen they can't coarsen	I can't be coarsening you can't be coarsening he can't be coarsening we can't be coarsening you can't be coarsening they can't be coarsening
Perfect	V-ing perfect
I can't have coarsened you can't have coarsened he can't have coarsened we can't have coarsened you can't have coarsened they can't have coarsened	I can't have been coarsening you can't have been coarsening he can't have been coarsening we can't have been coarsening you can't have been coarsening they can't have been coarsening

Interrogative form

Simple form	V-ing form
can I coarsen? can you coarsen? can he coarsen? can we coarsen? can you coarsen? can they coarsen?	can I be coarsening? can you be coarsening? can he be coarsening? can we be coarsening? can you be coarsening? can they be coarsening?
Perfect	V-ing perfect
can I have coarsened? can you have coarsened? can he have coarsened? can we have coarsened? can you have coarsened? can they have coarsened?	can I have been coarsening? can you have been coarsening? can he have been coarsening? can we have been coarsening? can you have been coarsening? can they have been coarsening?

Interro-negative form

Simple form	V-ing form
can't I coarsen? can't you coarsen? can't he coarsen? can't we coarsen? can't you coarsen? can't they coarsen?	can't I be coarsening? can't you be coarsening? can't he be coarsening? can't we be coarsening? can't you be coarsening? can't they be coarsening?
Perfect	V-ing perfect
can't I have coarsened? can't you have coarsened? can't he have coarsened? can't we have coarsened? can't you have coarsened? can't they have coarsened?	can't I have been coarsening? can't you have been coarsening? can't he have been coarsening? can't we have been coarsening? can't you have been coarsening? can't they have been coarsening?