could unblock
Regular verb: unblock - unblocked- unblocked

Affirmation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I could unblock
you could unblock
he could unblock
we could unblock
you could unblock
they could unblock 	I could be unblocking
you could be unblocking
he could be unblocking
we could be unblocking
you could be unblocking
they could be unblocking	I could have unblocked
you could have unblocked
he could have unblocked
we could have unblocked
you could have unblocked
they could have unblocked	I could have been unblocking
you could have been unblocking
he could have been unblocking
we could have been unblocking
you could have been unblocking
they could have been unblocking	

Negation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I could not unblock
you could not unblock
he could not unblock
we could not unblock
you could not unblock
they could not unblock 	I could not be unblocking
you could not be unblocking
he could not be unblocking
we could not be unblocking
you could not be unblocking
they could not be unblocking	I could not have unblocked
you could not have unblocked
he could not have unblocked
we could not have unblocked
you could not have unblocked
they could not have unblocked	I could not have been unblocking
you could not have been unblocking
he could not have been unblocking
we could not have been unblocking
you could not have been unblocking
they could not have been unblocking	

Interrogative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
could I unblock?
could you unblock?
could he unblock?
could we unblock?
could you unblock?
could they unblock? 	could I be unblocking?
could you be unblocking?
could he be unblocking?
could we be unblocking?
could you be unblocking?
could they be unblocking? 	could I have unblocked?
could you have unblocked?
could he have unblocked?
could we have unblocked?
could you have unblocked?
could they have unblocked? 	could I have been unblocking?
could you have been unblocking?
could he have been unblocking?
could we have been unblocking?
could you have been unblocking?
could they have been unblocking? 	

Interro-negative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
could I not unblock?
could you not unblock?
could he not unblock?
could we not unblock?
could you not unblock?
could they not unblock? 	could I not be unblocking?
could you not be unblocking?
could he not be unblocking?
could we not be unblocking?
could you not be unblocking?
could they not be unblocking? 	could I not have unblocked?
could you not have unblocked?
could he not have unblocked?
could we not have unblocked?
could you not have unblocked?
could they not have unblocked? 	could I not have been unblocking?
could you not have been unblocking?
could he not have been unblocking?
could we not have been unblocking?
could you not have been unblocking?
could they not have been unblocking?