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 cannot derail
you cannot derail
he cannot derail
we cannot derail
you cannot derail
they cannot derail 	I cannot be derailing
you cannot be derailing
he cannot be derailing
we cannot be derailing
you cannot be derailing
they cannot be derailing	I cannot have derailed
you cannot have derailed
he cannot have derailed
we cannot have derailed
you cannot have derailed
they cannot have derailed	I cannot have been derailing
you cannot have been derailing
he cannot have been derailing
we cannot have been derailing
you cannot have been derailing
they cannot 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 I not derail?
can you not derail?
can he not derail?
can we not derail?
can you not derail?
can they not derail? 	can I not be derailing?
can you not be derailing?
can he not be derailing?
can we not be derailing?
can you not be derailing?
can they not be derailing? 	can I not have derailed?
can you not have derailed?
can he not have derailed?
can we not have derailed?
can you not have derailed?
can they not have derailed? 	can I not have been derailing?
can you not have been derailing?
can he not have been derailing?
can we not have been derailing?
can you not have been derailing?
can they not have been derailing?