English verb conjugation
CAN RAIL

Regular verb: rail - railed - railed

Affirmation

Simple form	V-ing form
I can rail you can rail she can rail we can rail you can rail they can rail	I can be railing you can be railing she can be railing we can be railing you can be railing they can be railing
Perfect	V-ing perfect
I can have railed you can have railed she can have railed we can have railed you can have railed they can have railed	I can have been railing you can have been railing she can have been railing we can have been railing you can have been railing they can have been railing

Negation

Simple form	V-ing form
I can't rail you can't rail she can't rail we can't rail you can't rail they can't rail	I can't be railing you can't be railing she can't be railing we can't be railing you can't be railing they can't be railing
Perfect	V-ing perfect
I can't have railed you can't have railed she can't have railed we can't have railed you can't have railed they can't have railed	I can't have been railing you can't have been railing she can't have been railing we can't have been railing you can't have been railing they can't have been railing

Interrogative form

Simple form	V-ing form
can I rail? can you rail? can she rail? can we rail? can you rail? can they rail?	can I be railing? can you be railing? can she be railing? can we be railing? can you be railing? can they be railing?
Perfect	V-ing perfect
can I have railed? can you have railed? can she have railed? can we have railed? can you have railed? can they have railed?	can I have been railing? can you have been railing? can she have been railing? can we have been railing? can you have been railing? can they have been railing?

Interro-negative form

Simple form	V-ing form
can't I rail? can't you rail? can't she rail? can't we rail? can't you rail? can't they rail?	can't I be railing? can't you be railing? can't she be railing? can't we be railing? can't you be railing? can't they be railing?
Perfect	V-ing perfect
can't I have railed? can't you have railed? can't she have railed? can't we have railed? can't you have railed? can't they have railed?	can't I have been railing? can't you have been railing? can't she have been railing? can't we have been railing? can't you have been railing? can't they have been railing?