should warn
Verbo regular: warn - warned- warned

Afirmação 	
Forma simple 	Forma com V-ing 	Perfeito 	Perfeito com V-ing 	
I'd warn
you'd warn
she'd warn
we'd warn
you'd warn
they'd warn 	I'd be warning
you'd be warning
she'd be warning
we'd be warning
you'd be warning
they'd be warning	I should've warned
you should've warned
she should've warned
we should've warned
you should've warned
they should've warned	I should've been warning
you should've been warning
she should've been warning
we should've been warning
you should've been warning
they should've been warning	

Negação 	
Forma simple 	Forma com V-ing 	Perfeito 	Perfeito com V-ing 	
I shouldn't warn
you shouldn't warn
she shouldn't warn
we shouldn't warn
you shouldn't warn
they shouldn't warn 	I shouldn't be warning
you shouldn't be warning
she shouldn't be warning
we shouldn't be warning
you shouldn't be warning
they shouldn't be warning	I shouldn't have warned
you shouldn't have warned
she shouldn't have warned
we shouldn't have warned
you shouldn't have warned
they shouldn't have warned	I shouldn't have been warning
you shouldn't have been warning
she shouldn't have been warning
we shouldn't have been warning
you shouldn't have been warning
they shouldn't have been warning	

Forma interrogativa 	
Forma simple 	Forma com V-ing 	Perfeito 	Perfeito com V-ing 	
should I warn?
should you warn?
should she warn?
should we warn?
should you warn?
should they warn? 	should I be warning?
should you be warning?
should she be warning?
should we be warning?
should you be warning?
should they be warning? 	should I have warned?
should you have warned?
should she have warned?
should we have warned?
should you have warned?
should they have warned? 	should I have been warning?
should you have been warning?
should she have been warning?
should we have been warning?
should you have been warning?
should they have been warning? 	

Forma interro-Negação 	
Forma simple 	Forma com V-ing 	Perfeito 	Perfeito com V-ing 	
shouldn't I warn?
shouldn't you warn?
shouldn't she warn?
shouldn't we warn?
shouldn't you warn?
shouldn't they warn? 	shouldn't I be warning?
shouldn't you be warning?
shouldn't she be warning?
shouldn't we be warning?
shouldn't you be warning?
shouldn't they be warning? 	shouldn't I have warned?
shouldn't you have warned?
shouldn't she have warned?
shouldn't we have warned?
shouldn't you have warned?
shouldn't they have warned? 	shouldn't I have been warning?
shouldn't you have been warning?
shouldn't she have been warning?
shouldn't we have been warning?
shouldn't you have been warning?
shouldn't they have been warning?