can nail
Regular verb: nail - nailed- nailed

Affirmation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I can nail
you can nail
she can nail
we can nail
you can nail
they can nail 	I can be nailing
you can be nailing
she can be nailing
we can be nailing
you can be nailing
they can be nailing	I can have nailed
you can have nailed
she can have nailed
we can have nailed
you can have nailed
they can have nailed	I can have been nailing
you can have been nailing
she can have been nailing
we can have been nailing
you can have been nailing
they can have been nailing	

Negation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I cannot nail
you cannot nail
she cannot nail
we cannot nail
you cannot nail
they cannot nail 	I cannot be nailing
you cannot be nailing
she cannot be nailing
we cannot be nailing
you cannot be nailing
they cannot be nailing	I cannot have nailed
you cannot have nailed
she cannot have nailed
we cannot have nailed
you cannot have nailed
they cannot have nailed	I cannot have been nailing
you cannot have been nailing
she cannot have been nailing
we cannot have been nailing
you cannot have been nailing
they cannot have been nailing	

Interrogative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
can I nail?
can you nail?
can she nail?
can we nail?
can you nail?
can they nail? 	can I be nailing?
can you be nailing?
can she be nailing?
can we be nailing?
can you be nailing?
can they be nailing? 	can I have nailed?
can you have nailed?
can she have nailed?
can we have nailed?
can you have nailed?
can they have nailed? 	can I have been nailing?
can you have been nailing?
can she have been nailing?
can we have been nailing?
can you have been nailing?
can they have been nailing? 	

Interro-negative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
can I not nail?
can you not nail?
can she not nail?
can we not nail?
can you not nail?
can they not nail? 	can I not be nailing?
can you not be nailing?
can she not be nailing?
can we not be nailing?
can you not be nailing?
can they not be nailing? 	can I not have nailed?
can you not have nailed?
can she not have nailed?
can we not have nailed?
can you not have nailed?
can they not have nailed? 	can I not have been nailing?
can you not have been nailing?
can she not have been nailing?
can we not have been nailing?
can you not have been nailing?
can they not have been nailing?