could step
Verbo regular: step - stepped- stepped

Afirmação 	
Forma simple 	Forma com V-ing 	Perfeito 	Perfeito com V-ing 	
I could step
you could step
he could step
we could step
you could step
they could step 	I could be stepping
you could be stepping
he could be stepping
we could be stepping
you could be stepping
they could be stepping	I could have stepped
you could have stepped
he could have stepped
we could have stepped
you could have stepped
they could have stepped	I could have been stepping
you could have been stepping
he could have been stepping
we could have been stepping
you could have been stepping
they could have been stepping	

Negação 	
Forma simple 	Forma com V-ing 	Perfeito 	Perfeito com V-ing 	
I could not step
you could not step
he could not step
we could not step
you could not step
they could not step 	I could not be stepping
you could not be stepping
he could not be stepping
we could not be stepping
you could not be stepping
they could not be stepping	I could not have stepped
you could not have stepped
he could not have stepped
we could not have stepped
you could not have stepped
they could not have stepped	I could not have been stepping
you could not have been stepping
he could not have been stepping
we could not have been stepping
you could not have been stepping
they could not have been stepping	

Forma interrogativa 	
Forma simple 	Forma com V-ing 	Perfeito 	Perfeito com V-ing 	
could I step?
could you step?
could he step?
could we step?
could you step?
could they step? 	could I be stepping?
could you be stepping?
could he be stepping?
could we be stepping?
could you be stepping?
could they be stepping? 	could I have stepped?
could you have stepped?
could he have stepped?
could we have stepped?
could you have stepped?
could they have stepped? 	could I have been stepping?
could you have been stepping?
could he have been stepping?
could we have been stepping?
could you have been stepping?
could they have been stepping? 	

Forma interro-Negação 	
Forma simple 	Forma com V-ing 	Perfeito 	Perfeito com V-ing 	
could I not step?
could you not step?
could he not step?
could we not step?
could you not step?
could they not step? 	could I not be stepping?
could you not be stepping?
could he not be stepping?
could we not be stepping?
could you not be stepping?
could they not be stepping? 	could I not have stepped?
could you not have stepped?
could he not have stepped?
could we not have stepped?
could you not have stepped?
could they not have stepped? 	could I not have been stepping?
could you not have been stepping?
could he not have been stepping?
could we not have been stepping?
could you not have been stepping?
could they not have been stepping?