should look
Regular verb: look - looked- looked

Affirmation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I'd look
you'd look
she'd look
we'd look
you'd look
they'd look 	I'd be looking
you'd be looking
she'd be looking
we'd be looking
you'd be looking
they'd be looking	I should've looked
you should've looked
she should've looked
we should've looked
you should've looked
they should've looked	I should've been looking
you should've been looking
she should've been looking
we should've been looking
you should've been looking
they should've been looking	

Negation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I shouldn't look
you shouldn't look
she shouldn't look
we shouldn't look
you shouldn't look
they shouldn't look 	I shouldn't be looking
you shouldn't be looking
she shouldn't be looking
we shouldn't be looking
you shouldn't be looking
they shouldn't be looking	I shouldn't have looked
you shouldn't have looked
she shouldn't have looked
we shouldn't have looked
you shouldn't have looked
they shouldn't have looked	I shouldn't have been looking
you shouldn't have been looking
she shouldn't have been looking
we shouldn't have been looking
you shouldn't have been looking
they shouldn't have been looking	

Interrogative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
should I look?
should you look?
should she look?
should we look?
should you look?
should they look? 	should I be looking?
should you be looking?
should she be looking?
should we be looking?
should you be looking?
should they be looking? 	should I have looked?
should you have looked?
should she have looked?
should we have looked?
should you have looked?
should they have looked? 	should I have been looking?
should you have been looking?
should she have been looking?
should we have been looking?
should you have been looking?
should they have been looking? 	

Interro-negative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
shouldn't I look?
shouldn't you look?
shouldn't she look?
shouldn't we look?
shouldn't you look?
shouldn't they look? 	shouldn't I be looking?
shouldn't you be looking?
shouldn't she be looking?
shouldn't we be looking?
shouldn't you be looking?
shouldn't they be looking? 	shouldn't I have looked?
shouldn't you have looked?
shouldn't she have looked?
shouldn't we have looked?
shouldn't you have looked?
shouldn't they have looked? 	shouldn't I have been looking?
shouldn't you have been looking?
shouldn't she have been looking?
shouldn't we have been looking?
shouldn't you have been looking?
shouldn't they have been looking?