should add
Regular verb: add - added- added

Affirmation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I'd add
you'd add
she'd add
we'd add
you'd add
they'd add 	I'd be adding
you'd be adding
she'd be adding
we'd be adding
you'd be adding
they'd be adding	I should've added
you should've added
she should've added
we should've added
you should've added
they should've added	I should've been adding
you should've been adding
she should've been adding
we should've been adding
you should've been adding
they should've been adding	

Negation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I shouldn't add
you shouldn't add
she shouldn't add
we shouldn't add
you shouldn't add
they shouldn't add 	I shouldn't be adding
you shouldn't be adding
she shouldn't be adding
we shouldn't be adding
you shouldn't be adding
they shouldn't be adding	I shouldn't have added
you shouldn't have added
she shouldn't have added
we shouldn't have added
you shouldn't have added
they shouldn't have added	I shouldn't have been adding
you shouldn't have been adding
she shouldn't have been adding
we shouldn't have been adding
you shouldn't have been adding
they shouldn't have been adding	

Interrogative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
should I add?
should you add?
should she add?
should we add?
should you add?
should they add? 	should I be adding?
should you be adding?
should she be adding?
should we be adding?
should you be adding?
should they be adding? 	should I have added?
should you have added?
should she have added?
should we have added?
should you have added?
should they have added? 	should I have been adding?
should you have been adding?
should she have been adding?
should we have been adding?
should you have been adding?
should they have been adding? 	

Interro-negative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
shouldn't I add?
shouldn't you add?
shouldn't she add?
shouldn't we add?
shouldn't you add?
shouldn't they add? 	shouldn't I be adding?
shouldn't you be adding?
shouldn't she be adding?
shouldn't we be adding?
shouldn't you be adding?
shouldn't they be adding? 	shouldn't I have added?
shouldn't you have added?
shouldn't she have added?
shouldn't we have added?
shouldn't you have added?
shouldn't they have added? 	shouldn't I have been adding?
shouldn't you have been adding?
shouldn't she have been adding?
shouldn't we have been adding?
shouldn't you have been adding?
shouldn't they have been adding?