could twinkle
Verbo regular: twinkle - twinkled- twinkled

Afirmação 	
Forma simple 	Forma com V-ing 	Perfeito 	Perfeito com V-ing 	
I could twinkle
you could twinkle
he could twinkle
we could twinkle
you could twinkle
they could twinkle 	I could be twinkling
you could be twinkling
he could be twinkling
we could be twinkling
you could be twinkling
they could be twinkling	I could have twinkled
you could have twinkled
he could have twinkled
we could have twinkled
you could have twinkled
they could have twinkled	I could have been twinkling
you could have been twinkling
he could have been twinkling
we could have been twinkling
you could have been twinkling
they could have been twinkling	

Negação 	
Forma simple 	Forma com V-ing 	Perfeito 	Perfeito com V-ing 	
I could not twinkle
you could not twinkle
he could not twinkle
we could not twinkle
you could not twinkle
they could not twinkle 	I could not be twinkling
you could not be twinkling
he could not be twinkling
we could not be twinkling
you could not be twinkling
they could not be twinkling	I could not have twinkled
you could not have twinkled
he could not have twinkled
we could not have twinkled
you could not have twinkled
they could not have twinkled	I could not have been twinkling
you could not have been twinkling
he could not have been twinkling
we could not have been twinkling
you could not have been twinkling
they could not have been twinkling	

Forma interrogativa 	
Forma simple 	Forma com V-ing 	Perfeito 	Perfeito com V-ing 	
could I twinkle?
could you twinkle?
could he twinkle?
could we twinkle?
could you twinkle?
could they twinkle? 	could I be twinkling?
could you be twinkling?
could he be twinkling?
could we be twinkling?
could you be twinkling?
could they be twinkling? 	could I have twinkled?
could you have twinkled?
could he have twinkled?
could we have twinkled?
could you have twinkled?
could they have twinkled? 	could I have been twinkling?
could you have been twinkling?
could he have been twinkling?
could we have been twinkling?
could you have been twinkling?
could they have been twinkling? 	

Forma interro-Negação 	
Forma simple 	Forma com V-ing 	Perfeito 	Perfeito com V-ing 	
could I not twinkle?
could you not twinkle?
could he not twinkle?
could we not twinkle?
could you not twinkle?
could they not twinkle? 	could I not be twinkling?
could you not be twinkling?
could he not be twinkling?
could we not be twinkling?
could you not be twinkling?
could they not be twinkling? 	could I not have twinkled?
could you not have twinkled?
could he not have twinkled?
could we not have twinkled?
could you not have twinkled?
could they not have twinkled? 	could I not have been twinkling?
could you not have been twinkling?
could he not have been twinkling?
could we not have been twinkling?
could you not have been twinkling?
could they not have been twinkling?