could unlink
Regular verb: unlink - unlinked- unlinked

Affirmation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I could unlink
you could unlink
he could unlink
we could unlink
you could unlink
they could unlink 	I could be unlinking
you could be unlinking
he could be unlinking
we could be unlinking
you could be unlinking
they could be unlinking	I could have unlinked
you could have unlinked
he could have unlinked
we could have unlinked
you could have unlinked
they could have unlinked	I could have been unlinking
you could have been unlinking
he could have been unlinking
we could have been unlinking
you could have been unlinking
they could have been unlinking	

Negation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I couldn't unlink
you couldn't unlink
he couldn't unlink
we couldn't unlink
you couldn't unlink
they couldn't unlink 	I couldn't be unlinking
you couldn't be unlinking
he couldn't be unlinking
we couldn't be unlinking
you couldn't be unlinking
they couldn't be unlinking	I couldn't have unlinked
you couldn't have unlinked
he couldn't have unlinked
we couldn't have unlinked
you couldn't have unlinked
they couldn't have unlinked	I couldn't have been unlinking
you couldn't have been unlinking
he couldn't have been unlinking
we couldn't have been unlinking
you couldn't have been unlinking
they couldn't have been unlinking	

Interrogative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
could I unlink?
could you unlink?
could he unlink?
could we unlink?
could you unlink?
could they unlink? 	could I be unlinking?
could you be unlinking?
could he be unlinking?
could we be unlinking?
could you be unlinking?
could they be unlinking? 	could I have unlinked?
could you have unlinked?
could he have unlinked?
could we have unlinked?
could you have unlinked?
could they have unlinked? 	could I have been unlinking?
could you have been unlinking?
could he have been unlinking?
could we have been unlinking?
could you have been unlinking?
could they have been unlinking? 	

Interro-negative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
couldn't I unlink?
couldn't you unlink?
couldn't he unlink?
couldn't we unlink?
couldn't you unlink?
couldn't they unlink? 	couldn't I be unlinking?
couldn't you be unlinking?
couldn't he be unlinking?
couldn't we be unlinking?
couldn't you be unlinking?
couldn't they be unlinking? 	couldn't I have unlinked?
couldn't you have unlinked?
couldn't he have unlinked?
couldn't we have unlinked?
couldn't you have unlinked?
couldn't they have unlinked? 	couldn't I have been unlinking?
couldn't you have been unlinking?
couldn't he have been unlinking?
couldn't we have been unlinking?
couldn't you have been unlinking?
couldn't they have been unlinking?