Warning, this verb may not exist. Conjugation is given as example.
Affirmation
Simple form
I could focus focus you could focus focus she could focus focus we could focus focus you could focus focus they could focus focus
V-ing form
I could be focus focusing you could be focus focusing she could be focus focusing we could be focus focusing you could be focus focusing they could be focus focusing
Perfect
I could have focus focused you could have focus focused she could have focus focused we could have focus focused you could have focus focused they could have focus focused
V-ing perfect
I could have been focus focusing you could have been focus focusing she could have been focus focusing we could have been focus focusing you could have been focus focusing they could have been focus focusing
Negation
Simple form
I could not focus focus you could not focus focus she could not focus focus we could not focus focus you could not focus focus they could not focus focus
V-ing form
I could not be focus focusing you could not be focus focusing she could not be focus focusing we could not be focus focusing you could not be focus focusing they could not be focus focusing
Perfect
I could not have focus focused you could not have focus focused she could not have focus focused we could not have focus focused you could not have focus focused they could not have focus focused
V-ing perfect
I could not have been focus focusing you could not have been focus focusing she could not have been focus focusing we could not have been focus focusing you could not have been focus focusing they could not have been focus focusing
Interrogative form
Simple form
could I focus focus? could you focus focus? could she focus focus? could we focus focus? could you focus focus? could they focus focus?
V-ing form
could I be focus focusing? could you be focus focusing? could she be focus focusing? could we be focus focusing? could you be focus focusing? could they be focus focusing?
Perfect
could I have focus focused? could you have focus focused? could she have focus focused? could we have focus focused? could you have focus focused? could they have focus focused?
V-ing perfect
could I have been focus focusing? could you have been focus focusing? could she have been focus focusing? could we have been focus focusing? could you have been focus focusing? could they have been focus focusing?
Interro-negative form
Simple form
could I not focus focus? could you not focus focus? could she not focus focus? could we not focus focus? could you not focus focus? could they not focus focus?
V-ing form
could I not be focus focusing? could you not be focus focusing? could she not be focus focusing? could we not be focus focusing? could you not be focus focusing? could they not be focus focusing?
Perfect
could I not have focus focused? could you not have focus focused? could she not have focus focused? could we not have focus focused? could you not have focus focused? could they not have focus focused?
V-ing perfect
could I not have been focus focusing? could you not have been focus focusing? could she not have been focus focusing? could we not have been focus focusing? could you not have been focus focusing? could they not have been focus focusing?