could fork
Regular verb: fork - forked- forked

Affirmation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I could fork
you could fork
she could fork
we could fork
you could fork
they could fork 	I could be forking
you could be forking
she could be forking
we could be forking
you could be forking
they could be forking	I could have forked
you could have forked
she could have forked
we could have forked
you could have forked
they could have forked	I could have been forking
you could have been forking
she could have been forking
we could have been forking
you could have been forking
they could have been forking	

Negation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I could not fork
you could not fork
she could not fork
we could not fork
you could not fork
they could not fork 	I could not be forking
you could not be forking
she could not be forking
we could not be forking
you could not be forking
they could not be forking	I could not have forked
you could not have forked
she could not have forked
we could not have forked
you could not have forked
they could not have forked	I could not have been forking
you could not have been forking
she could not have been forking
we could not have been forking
you could not have been forking
they could not have been forking	

Interrogative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
could I fork?
could you fork?
could she fork?
could we fork?
could you fork?
could they fork? 	could I be forking?
could you be forking?
could she be forking?
could we be forking?
could you be forking?
could they be forking? 	could I have forked?
could you have forked?
could she have forked?
could we have forked?
could you have forked?
could they have forked? 	could I have been forking?
could you have been forking?
could she have been forking?
could we have been forking?
could you have been forking?
could they have been forking? 	

Interro-negative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
could I not fork?
could you not fork?
could she not fork?
could we not fork?
could you not fork?
could they not fork? 	could I not be forking?
could you not be forking?
could she not be forking?
could we not be forking?
could you not be forking?
could they not be forking? 	could I not have forked?
could you not have forked?
could she not have forked?
could we not have forked?
could you not have forked?
could they not have forked? 	could I not have been forking?
could you not have been forking?
could she not have been forking?
could we not have been forking?
could you not have been forking?
could they not have been forking?