should smile
Regular verb: smile - smiled- smiled

Affirmation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I'd smile
you'd smile
he'd smile
we'd smile
you'd smile
they'd smile 	I'd be smiling
you'd be smiling
he'd be smiling
we'd be smiling
you'd be smiling
they'd be smiling	I should've smiled
you should've smiled
he should've smiled
we should've smiled
you should've smiled
they should've smiled	I should've been smiling
you should've been smiling
he should've been smiling
we should've been smiling
you should've been smiling
they should've been smiling	

Negation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I shouldn't smile
you shouldn't smile
he shouldn't smile
we shouldn't smile
you shouldn't smile
they shouldn't smile 	I shouldn't be smiling
you shouldn't be smiling
he shouldn't be smiling
we shouldn't be smiling
you shouldn't be smiling
they shouldn't be smiling	I shouldn't have smiled
you shouldn't have smiled
he shouldn't have smiled
we shouldn't have smiled
you shouldn't have smiled
they shouldn't have smiled	I shouldn't have been smiling
you shouldn't have been smiling
he shouldn't have been smiling
we shouldn't have been smiling
you shouldn't have been smiling
they shouldn't have been smiling	

Interrogative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
should I smile?
should you smile?
should he smile?
should we smile?
should you smile?
should they smile? 	should I be smiling?
should you be smiling?
should he be smiling?
should we be smiling?
should you be smiling?
should they be smiling? 	should I have smiled?
should you have smiled?
should he have smiled?
should we have smiled?
should you have smiled?
should they have smiled? 	should I have been smiling?
should you have been smiling?
should he have been smiling?
should we have been smiling?
should you have been smiling?
should they have been smiling? 	

Interro-negative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
shouldn't I smile?
shouldn't you smile?
shouldn't he smile?
shouldn't we smile?
shouldn't you smile?
shouldn't they smile? 	shouldn't I be smiling?
shouldn't you be smiling?
shouldn't he be smiling?
shouldn't we be smiling?
shouldn't you be smiling?
shouldn't they be smiling? 	shouldn't I have smiled?
shouldn't you have smiled?
shouldn't he have smiled?
shouldn't we have smiled?
shouldn't you have smiled?
shouldn't they have smiled? 	shouldn't I have been smiling?
shouldn't you have been smiling?
shouldn't he have been smiling?
shouldn't we have been smiling?
shouldn't you have been smiling?
shouldn't they have been smiling?