should focus
Regular verb: focus - focused- focused

Affirmation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I'd focus
you'd focus
she'd focus
we'd focus
you'd focus
they'd focus 	I'd be focusing
you'd be focusing
she'd be focusing
we'd be focusing
you'd be focusing
they'd be focusing	I should've focused
you should've focused
she should've focused
we should've focused
you should've focused
they should've focused	I should've been focusing
you should've been focusing
she should've been focusing
we should've been focusing
you should've been focusing
they should've been focusing	

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

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

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