should sing
Verbo irregular: sing - sang- sung

Afirmação 	
Forma simple 	Forma com V-ing 	Perfeito 	Perfeito com V-ing 	
I'd sing
you'd sing
she'd sing
we'd sing
you'd sing
they'd sing 	I'd be singing
you'd be singing
she'd be singing
we'd be singing
you'd be singing
they'd be singing	I should've sung
you should've sung
she should've sung
we should've sung
you should've sung
they should've sung	I should've been singing
you should've been singing
she should've been singing
we should've been singing
you should've been singing
they should've been singing	

Negação 	
Forma simple 	Forma com V-ing 	Perfeito 	Perfeito com V-ing 	
I shouldn't sing
you shouldn't sing
she shouldn't sing
we shouldn't sing
you shouldn't sing
they shouldn't sing 	I shouldn't be singing
you shouldn't be singing
she shouldn't be singing
we shouldn't be singing
you shouldn't be singing
they shouldn't be singing	I shouldn't have sung
you shouldn't have sung
she shouldn't have sung
we shouldn't have sung
you shouldn't have sung
they shouldn't have sung	I shouldn't have been singing
you shouldn't have been singing
she shouldn't have been singing
we shouldn't have been singing
you shouldn't have been singing
they shouldn't have been singing	

Forma interrogativa 	
Forma simple 	Forma com V-ing 	Perfeito 	Perfeito com V-ing 	
should I sing?
should you sing?
should she sing?
should we sing?
should you sing?
should they sing? 	should I be singing?
should you be singing?
should she be singing?
should we be singing?
should you be singing?
should they be singing? 	should I have sung?
should you have sung?
should she have sung?
should we have sung?
should you have sung?
should they have sung? 	should I have been singing?
should you have been singing?
should she have been singing?
should we have been singing?
should you have been singing?
should they have been singing? 	

Forma interro-Negação 	
Forma simple 	Forma com V-ing 	Perfeito 	Perfeito com V-ing 	
shouldn't I sing?
shouldn't you sing?
shouldn't she sing?
shouldn't we sing?
shouldn't you sing?
shouldn't they sing? 	shouldn't I be singing?
shouldn't you be singing?
shouldn't she be singing?
shouldn't we be singing?
shouldn't you be singing?
shouldn't they be singing? 	shouldn't I have sung?
shouldn't you have sung?
shouldn't she have sung?
shouldn't we have sung?
shouldn't you have sung?
shouldn't they have sung? 	shouldn't I have been singing?
shouldn't you have been singing?
shouldn't she have been singing?
shouldn't we have been singing?
shouldn't you have been singing?
shouldn't they have been singing?