I can derail you can derail she can derail we can derail you can derail they can derail
V-ing form
I can be derailing you can be derailing she can be derailing we can be derailing you can be derailing they can be derailing
Perfect
I can have derailed you can have derailed she can have derailed we can have derailed you can have derailed they can have derailed
V-ing perfect
I can have been derailing you can have been derailing she can have been derailing we can have been derailing you can have been derailing they can have been derailing
Negation
Simple form
I can't derail you can't derail she can't derail we can't derail you can't derail they can't derail
V-ing form
I can't be derailing you can't be derailing she can't be derailing we can't be derailing you can't be derailing they can't be derailing
Perfect
I can't have derailed you can't have derailed she can't have derailed we can't have derailed you can't have derailed they can't have derailed
V-ing perfect
I can't have been derailing you can't have been derailing she can't have been derailing we can't have been derailing you can't have been derailing they can't have been derailing
Interrogative form
Simple form
can I derail? can you derail? can she derail? can we derail? can you derail? can they derail?
V-ing form
can I be derailing? can you be derailing? can she be derailing? can we be derailing? can you be derailing? can they be derailing?
Perfect
can I have derailed? can you have derailed? can she have derailed? can we have derailed? can you have derailed? can they have derailed?
V-ing perfect
can I have been derailing? can you have been derailing? can she have been derailing? can we have been derailing? can you have been derailing? can they have been derailing?
Interro-negative form
Simple form
can't I derail? can't you derail? can't she derail? can't we derail? can't you derail? can't they derail?
V-ing form
can't I be derailing? can't you be derailing? can't she be derailing? can't we be derailing? can't you be derailing? can't they be derailing?
Perfect
can't I have derailed? can't you have derailed? can't she have derailed? can't we have derailed? can't you have derailed? can't they have derailed?
V-ing perfect
can't I have been derailing? can't you have been derailing? can't she have been derailing? can't we have been derailing? can't you have been derailing? can't they have been derailing?