could switchback
Verbo regular: switchback - switchbacked- switchbacked

Afirmación 	
Forma simple 	Forma con V-ing 	Perfecto 	Perfecto con V-ing 	
I could switchback
you could switchback
he could switchback
we could switchback
you could switchback
they could switchback 	I could be switchbacking
you could be switchbacking
he could be switchbacking
we could be switchbacking
you could be switchbacking
they could be switchbacking	I could have switchbacked
you could have switchbacked
he could have switchbacked
we could have switchbacked
you could have switchbacked
they could have switchbacked	I could have been switchbacking
you could have been switchbacking
he could have been switchbacking
we could have been switchbacking
you could have been switchbacking
they could have been switchbacking	

Negación 	
Forma simple 	Forma con V-ing 	Perfecto 	Perfecto con V-ing 	
I couldn't switchback
you couldn't switchback
he couldn't switchback
we couldn't switchback
you couldn't switchback
they couldn't switchback 	I couldn't be switchbacking
you couldn't be switchbacking
he couldn't be switchbacking
we couldn't be switchbacking
you couldn't be switchbacking
they couldn't be switchbacking	I couldn't have switchbacked
you couldn't have switchbacked
he couldn't have switchbacked
we couldn't have switchbacked
you couldn't have switchbacked
they couldn't have switchbacked	I couldn't have been switchbacking
you couldn't have been switchbacking
he couldn't have been switchbacking
we couldn't have been switchbacking
you couldn't have been switchbacking
they couldn't have been switchbacking	

Forma interrogativa 	
Forma simple 	Forma con V-ing 	Perfecto 	Perfecto con V-ing 	
could I switchback?
could you switchback?
could he switchback?
could we switchback?
could you switchback?
could they switchback? 	could I be switchbacking?
could you be switchbacking?
could he be switchbacking?
could we be switchbacking?
could you be switchbacking?
could they be switchbacking? 	could I have switchbacked?
could you have switchbacked?
could he have switchbacked?
could we have switchbacked?
could you have switchbacked?
could they have switchbacked? 	could I have been switchbacking?
could you have been switchbacking?
could he have been switchbacking?
could we have been switchbacking?
could you have been switchbacking?
could they have been switchbacking? 	

Forma interro-negativa 	
Forma simple 	Forma con V-ing 	Perfecto 	Perfecto con V-ing 	
couldn't I switchback?
couldn't you switchback?
couldn't he switchback?
couldn't we switchback?
couldn't you switchback?
couldn't they switchback? 	couldn't I be switchbacking?
couldn't you be switchbacking?
couldn't he be switchbacking?
couldn't we be switchbacking?
couldn't you be switchbacking?
couldn't they be switchbacking? 	couldn't I have switchbacked?
couldn't you have switchbacked?
couldn't he have switchbacked?
couldn't we have switchbacked?
couldn't you have switchbacked?
couldn't they have switchbacked? 	couldn't I have been switchbacking?
couldn't you have been switchbacking?
couldn't he have been switchbacking?
couldn't we have been switchbacking?
couldn't you have been switchbacking?
couldn't they have been switchbacking?