could yammer
Verbo regular: yammer - yammered- yammered

Afirmação 	
Forma simple 	Forma com V-ing 	Perfeito 	Perfeito com V-ing 	
I could yammer
you could yammer
he could yammer
we could yammer
you could yammer
they could yammer 	I could be yammering
you could be yammering
he could be yammering
we could be yammering
you could be yammering
they could be yammering	I could have yammered
you could have yammered
he could have yammered
we could have yammered
you could have yammered
they could have yammered	I could have been yammering
you could have been yammering
he could have been yammering
we could have been yammering
you could have been yammering
they could have been yammering	

Negação 	
Forma simple 	Forma com V-ing 	Perfeito 	Perfeito com V-ing 	
I couldn't yammer
you couldn't yammer
he couldn't yammer
we couldn't yammer
you couldn't yammer
they couldn't yammer 	I couldn't be yammering
you couldn't be yammering
he couldn't be yammering
we couldn't be yammering
you couldn't be yammering
they couldn't be yammering	I couldn't have yammered
you couldn't have yammered
he couldn't have yammered
we couldn't have yammered
you couldn't have yammered
they couldn't have yammered	I couldn't have been yammering
you couldn't have been yammering
he couldn't have been yammering
we couldn't have been yammering
you couldn't have been yammering
they couldn't have been yammering	

Forma interrogativa 	
Forma simple 	Forma com V-ing 	Perfeito 	Perfeito com V-ing 	
could I yammer?
could you yammer?
could he yammer?
could we yammer?
could you yammer?
could they yammer? 	could I be yammering?
could you be yammering?
could he be yammering?
could we be yammering?
could you be yammering?
could they be yammering? 	could I have yammered?
could you have yammered?
could he have yammered?
could we have yammered?
could you have yammered?
could they have yammered? 	could I have been yammering?
could you have been yammering?
could he have been yammering?
could we have been yammering?
could you have been yammering?
could they have been yammering? 	

Forma interro-Negação 	
Forma simple 	Forma com V-ing 	Perfeito 	Perfeito com V-ing 	
couldn't I yammer?
couldn't you yammer?
couldn't he yammer?
couldn't we yammer?
couldn't you yammer?
couldn't they yammer? 	couldn't I be yammering?
couldn't you be yammering?
couldn't he be yammering?
couldn't we be yammering?
couldn't you be yammering?
couldn't they be yammering? 	couldn't I have yammered?
couldn't you have yammered?
couldn't he have yammered?
couldn't we have yammered?
couldn't you have yammered?
couldn't they have yammered? 	couldn't I have been yammering?
couldn't you have been yammering?
couldn't he have been yammering?
couldn't we have been yammering?
couldn't you have been yammering?
couldn't they have been yammering?