could singe
Verbo regolare: singe - singed- singed

Affermazione 	
Forma semplice 	Forma con V-ing 	Perfetto 	Perfetto con V-ing 	
I could singe
you could singe
he could singe
we could singe
you could singe
they could singe 	I could be singing
you could be singing
he could be singing
we could be singing
you could be singing
they could be singing	I could have singed
you could have singed
he could have singed
we could have singed
you could have singed
they could have singed	I could have been singing
you could have been singing
he could have been singing
we could have been singing
you could have been singing
they could have been singing	

Negazione 	
Forma semplice 	Forma con V-ing 	Perfetto 	Perfetto con V-ing 	
I couldn't singe
you couldn't singe
he couldn't singe
we couldn't singe
you couldn't singe
they couldn't singe 	I couldn't be singing
you couldn't be singing
he couldn't be singing
we couldn't be singing
you couldn't be singing
they couldn't be singing	I couldn't have singed
you couldn't have singed
he couldn't have singed
we couldn't have singed
you couldn't have singed
they couldn't have singed	I couldn't have been singing
you couldn't have been singing
he couldn't have been singing
we couldn't have been singing
you couldn't have been singing
they couldn't have been singing	

Forma interrogativa 	
Forma semplice 	Forma con V-ing 	Perfetto 	Perfetto con V-ing 	
could I singe?
could you singe?
could he singe?
could we singe?
could you singe?
could they singe? 	could I be singing?
could you be singing?
could he be singing?
could we be singing?
could you be singing?
could they be singing? 	could I have singed?
could you have singed?
could he have singed?
could we have singed?
could you have singed?
could they have singed? 	could I have been singing?
could you have been singing?
could he have been singing?
could we have been singing?
could you have been singing?
could they have been singing? 	

Forma interro-negativa 	
Forma semplice 	Forma con V-ing 	Perfetto 	Perfetto con V-ing 	
couldn't I singe?
couldn't you singe?
couldn't he singe?
couldn't we singe?
couldn't you singe?
couldn't they singe? 	couldn't I be singing?
couldn't you be singing?
couldn't he be singing?
couldn't we be singing?
couldn't you be singing?
couldn't they be singing? 	couldn't I have singed?
couldn't you have singed?
couldn't he have singed?
couldn't we have singed?
couldn't you have singed?
couldn't they have singed? 	couldn't I have been singing?
couldn't you have been singing?
couldn't he have been singing?
couldn't we have been singing?
couldn't you have been singing?
couldn't they have been singing?