could scam
Verbo regular: scam - scammed- scammed

Afirmación 	
Forma simple 	Forma con V-ing 	Perfecto 	Perfecto con V-ing 	
I could scam
you could scam
he could scam
we could scam
you could scam
they could scam 	I could be scamming
you could be scamming
he could be scamming
we could be scamming
you could be scamming
they could be scamming	I could have scammed
you could have scammed
he could have scammed
we could have scammed
you could have scammed
they could have scammed	I could have been scamming
you could have been scamming
he could have been scamming
we could have been scamming
you could have been scamming
they could have been scamming	

Negación 	
Forma simple 	Forma con V-ing 	Perfecto 	Perfecto con V-ing 	
I couldn't scam
you couldn't scam
he couldn't scam
we couldn't scam
you couldn't scam
they couldn't scam 	I couldn't be scamming
you couldn't be scamming
he couldn't be scamming
we couldn't be scamming
you couldn't be scamming
they couldn't be scamming	I couldn't have scammed
you couldn't have scammed
he couldn't have scammed
we couldn't have scammed
you couldn't have scammed
they couldn't have scammed	I couldn't have been scamming
you couldn't have been scamming
he couldn't have been scamming
we couldn't have been scamming
you couldn't have been scamming
they couldn't have been scamming	

Forma interrogativa 	
Forma simple 	Forma con V-ing 	Perfecto 	Perfecto con V-ing 	
could I scam?
could you scam?
could he scam?
could we scam?
could you scam?
could they scam? 	could I be scamming?
could you be scamming?
could he be scamming?
could we be scamming?
could you be scamming?
could they be scamming? 	could I have scammed?
could you have scammed?
could he have scammed?
could we have scammed?
could you have scammed?
could they have scammed? 	could I have been scamming?
could you have been scamming?
could he have been scamming?
could we have been scamming?
could you have been scamming?
could they have been scamming? 	

Forma interro-negativa 	
Forma simple 	Forma con V-ing 	Perfecto 	Perfecto con V-ing 	
couldn't I scam?
couldn't you scam?
couldn't he scam?
couldn't we scam?
couldn't you scam?
couldn't they scam? 	couldn't I be scamming?
couldn't you be scamming?
couldn't he be scamming?
couldn't we be scamming?
couldn't you be scamming?
couldn't they be scamming? 	couldn't I have scammed?
couldn't you have scammed?
couldn't he have scammed?
couldn't we have scammed?
couldn't you have scammed?
couldn't they have scammed? 	couldn't I have been scamming?
couldn't you have been scamming?
couldn't he have been scamming?
couldn't we have been scamming?
couldn't you have been scamming?
couldn't they have been scamming?