could signal
Verbo regolare: signal - signalled- signalled

Affermazione 	
Forma semplice 	Forma con V-ing 	Perfetto 	Perfetto con V-ing 	
I could signal
you could signal
he could signal
we could signal
you could signal
they could signal 	I could be signalling
you could be signalling
he could be signalling
we could be signalling
you could be signalling
they could be signalling	I could have signalled
you could have signalled
he could have signalled
we could have signalled
you could have signalled
they could have signalled	I could have been signalling
you could have been signalling
he could have been signalling
we could have been signalling
you could have been signalling
they could have been signalling	

Negazione 	
Forma semplice 	Forma con V-ing 	Perfetto 	Perfetto con V-ing 	
I couldn't signal
you couldn't signal
he couldn't signal
we couldn't signal
you couldn't signal
they couldn't signal 	I couldn't be signalling
you couldn't be signalling
he couldn't be signalling
we couldn't be signalling
you couldn't be signalling
they couldn't be signalling	I couldn't have signalled
you couldn't have signalled
he couldn't have signalled
we couldn't have signalled
you couldn't have signalled
they couldn't have signalled	I couldn't have been signalling
you couldn't have been signalling
he couldn't have been signalling
we couldn't have been signalling
you couldn't have been signalling
they couldn't have been signalling	

Forma interrogativa 	
Forma semplice 	Forma con V-ing 	Perfetto 	Perfetto con V-ing 	
could I signal?
could you signal?
could he signal?
could we signal?
could you signal?
could they signal? 	could I be signalling?
could you be signalling?
could he be signalling?
could we be signalling?
could you be signalling?
could they be signalling? 	could I have signalled?
could you have signalled?
could he have signalled?
could we have signalled?
could you have signalled?
could they have signalled? 	could I have been signalling?
could you have been signalling?
could he have been signalling?
could we have been signalling?
could you have been signalling?
could they have been signalling? 	

Forma interro-negativa 	
Forma semplice 	Forma con V-ing 	Perfetto 	Perfetto con V-ing 	
couldn't I signal?
couldn't you signal?
couldn't he signal?
couldn't we signal?
couldn't you signal?
couldn't they signal? 	couldn't I be signalling?
couldn't you be signalling?
couldn't he be signalling?
couldn't we be signalling?
couldn't you be signalling?
couldn't they be signalling? 	couldn't I have signalled?
couldn't you have signalled?
couldn't he have signalled?
couldn't we have signalled?
couldn't you have signalled?
couldn't they have signalled? 	couldn't I have been signalling?
couldn't you have been signalling?
couldn't he have been signalling?
couldn't we have been signalling?
couldn't you have been signalling?
couldn't they have been signalling?