can focus
Regular verb: focus - focused- focused

Affirmation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I can focus
you can focus
she can focus
we can focus
you can focus
they can focus 	I can be focusing
you can be focusing
she can be focusing
we can be focusing
you can be focusing
they can be focusing	I can have focused
you can have focused
she can have focused
we can have focused
you can have focused
they can have focused	I can have been focusing
you can have been focusing
she can have been focusing
we can have been focusing
you can have been focusing
they can have been focusing	

Negation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I cannot focus
you cannot focus
she cannot focus
we cannot focus
you cannot focus
they cannot focus 	I cannot be focusing
you cannot be focusing
she cannot be focusing
we cannot be focusing
you cannot be focusing
they cannot be focusing	I cannot have focused
you cannot have focused
she cannot have focused
we cannot have focused
you cannot have focused
they cannot have focused	I cannot have been focusing
you cannot have been focusing
she cannot have been focusing
we cannot have been focusing
you cannot have been focusing
they cannot have been focusing	

Interrogative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
can I focus?
can you focus?
can she focus?
can we focus?
can you focus?
can they focus? 	can I be focusing?
can you be focusing?
can she be focusing?
can we be focusing?
can you be focusing?
can they be focusing? 	can I have focused?
can you have focused?
can she have focused?
can we have focused?
can you have focused?
can they have focused? 	can I have been focusing?
can you have been focusing?
can she have been focusing?
can we have been focusing?
can you have been focusing?
can they have been focusing? 	

Interro-negative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
can I not focus?
can you not focus?
can she not focus?
can we not focus?
can you not focus?
can they not focus? 	can I not be focusing?
can you not be focusing?
can she not be focusing?
can we not be focusing?
can you not be focusing?
can they not be focusing? 	can I not have focused?
can you not have focused?
can she not have focused?
can we not have focused?
can you not have focused?
can they not have focused? 	can I not have been focusing?
can you not have been focusing?
can she not have been focusing?
can we not have been focusing?
can you not have been focusing?
can they not have been focusing?