could travel
Verbo regular: travel - travelled- travelled

Afirmação 	
Forma simple 	Forma com V-ing 	Perfeito 	Perfeito com V-ing 	
I could travel
you could travel
he could travel
we could travel
you could travel
they could travel 	I could be travelling
you could be travelling
he could be travelling
we could be travelling
you could be travelling
they could be travelling	I could have travelled
you could have travelled
he could have travelled
we could have travelled
you could have travelled
they could have travelled	I could have been travelling
you could have been travelling
he could have been travelling
we could have been travelling
you could have been travelling
they could have been travelling	

Negação 	
Forma simple 	Forma com V-ing 	Perfeito 	Perfeito com V-ing 	
I could not travel
you could not travel
he could not travel
we could not travel
you could not travel
they could not travel 	I could not be travelling
you could not be travelling
he could not be travelling
we could not be travelling
you could not be travelling
they could not be travelling	I could not have travelled
you could not have travelled
he could not have travelled
we could not have travelled
you could not have travelled
they could not have travelled	I could not have been travelling
you could not have been travelling
he could not have been travelling
we could not have been travelling
you could not have been travelling
they could not have been travelling	

Forma interrogativa 	
Forma simple 	Forma com V-ing 	Perfeito 	Perfeito com V-ing 	
could I travel?
could you travel?
could he travel?
could we travel?
could you travel?
could they travel? 	could I be travelling?
could you be travelling?
could he be travelling?
could we be travelling?
could you be travelling?
could they be travelling? 	could I have travelled?
could you have travelled?
could he have travelled?
could we have travelled?
could you have travelled?
could they have travelled? 	could I have been travelling?
could you have been travelling?
could he have been travelling?
could we have been travelling?
could you have been travelling?
could they have been travelling? 	

Forma interro-Negação 	
Forma simple 	Forma com V-ing 	Perfeito 	Perfeito com V-ing 	
could I not travel?
could you not travel?
could he not travel?
could we not travel?
could you not travel?
could they not travel? 	could I not be travelling?
could you not be travelling?
could he not be travelling?
could we not be travelling?
could you not be travelling?
could they not be travelling? 	could I not have travelled?
could you not have travelled?
could he not have travelled?
could we not have travelled?
could you not have travelled?
could they not have travelled? 	could I not have been travelling?
could you not have been travelling?
could he not have been travelling?
could we not have been travelling?
could you not have been travelling?
could they not have been travelling?