could shake
Verbo irregular: shake - shook- shaken

Afirmação 	
Forma simple 	Forma com V-ing 	Perfeito 	Perfeito com V-ing 	
I could shake
you could shake
he could shake
we could shake
you could shake
they could shake 	I could be shaking
you could be shaking
he could be shaking
we could be shaking
you could be shaking
they could be shaking	I could have shaken
you could have shaken
he could have shaken
we could have shaken
you could have shaken
they could have shaken	I could have been shaking
you could have been shaking
he could have been shaking
we could have been shaking
you could have been shaking
they could have been shaking	

Negação 	
Forma simple 	Forma com V-ing 	Perfeito 	Perfeito com V-ing 	
I couldn't shake
you couldn't shake
he couldn't shake
we couldn't shake
you couldn't shake
they couldn't shake 	I couldn't be shaking
you couldn't be shaking
he couldn't be shaking
we couldn't be shaking
you couldn't be shaking
they couldn't be shaking	I couldn't have shaken
you couldn't have shaken
he couldn't have shaken
we couldn't have shaken
you couldn't have shaken
they couldn't have shaken	I couldn't have been shaking
you couldn't have been shaking
he couldn't have been shaking
we couldn't have been shaking
you couldn't have been shaking
they couldn't have been shaking	

Forma interrogativa 	
Forma simple 	Forma com V-ing 	Perfeito 	Perfeito com V-ing 	
could I shake?
could you shake?
could he shake?
could we shake?
could you shake?
could they shake? 	could I be shaking?
could you be shaking?
could he be shaking?
could we be shaking?
could you be shaking?
could they be shaking? 	could I have shaken?
could you have shaken?
could he have shaken?
could we have shaken?
could you have shaken?
could they have shaken? 	could I have been shaking?
could you have been shaking?
could he have been shaking?
could we have been shaking?
could you have been shaking?
could they have been shaking? 	

Forma interro-Negação 	
Forma simple 	Forma com V-ing 	Perfeito 	Perfeito com V-ing 	
couldn't I shake?
couldn't you shake?
couldn't he shake?
couldn't we shake?
couldn't you shake?
couldn't they shake? 	couldn't I be shaking?
couldn't you be shaking?
couldn't he be shaking?
couldn't we be shaking?
couldn't you be shaking?
couldn't they be shaking? 	couldn't I have shaken?
couldn't you have shaken?
couldn't he have shaken?
couldn't we have shaken?
couldn't you have shaken?
couldn't they have shaken? 	couldn't I have been shaking?
couldn't you have been shaking?
couldn't he have been shaking?
couldn't we have been shaking?
couldn't you have been shaking?
couldn't they have been shaking?