English verb conjugation
CAN RAIL

Regular verb: rail - railed - railed

Affirmation

Simple form	V-ing form
I can rail you can rail he can rail we can rail you can rail they can rail	I can be railing you can be railing he 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 he 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 he 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 he 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 he 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 he 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 he 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 he rail? can we rail? can you rail? can they rail?	can I be railing? can you be railing? can he 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 he 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 he 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 he 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 he 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 he 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 he have been railing? can't we have been railing? can't you have been railing? can't they have been railing?