can derail
Regular verb: derail - derailed- derailed

Affirmation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I can derail
you can derail
he can derail
we can derail
you can derail
they can derail 	I can be derailing
you can be derailing
he can be derailing
we can be derailing
you can be derailing
they can be derailing	I can have derailed
you can have derailed
he can have derailed
we can have derailed
you can have derailed
they can have derailed	I can have been derailing
you can have been derailing
he can have been derailing
we can have been derailing
you can have been derailing
they can have been derailing	

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

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