could circumnavigate
Verbo regular: circumnavigate - circumnavigated- circumnavigated

Afirmación 	
Forma simple 	Forma con V-ing 	Perfecto 	Perfecto con V-ing 	
I could circumnavigate
you could circumnavigate
he could circumnavigate
we could circumnavigate
you could circumnavigate
they could circumnavigate 	I could be circumnavigating
you could be circumnavigating
he could be circumnavigating
we could be circumnavigating
you could be circumnavigating
they could be circumnavigating	I could have circumnavigated
you could have circumnavigated
he could have circumnavigated
we could have circumnavigated
you could have circumnavigated
they could have circumnavigated	I could have been circumnavigating
you could have been circumnavigating
he could have been circumnavigating
we could have been circumnavigating
you could have been circumnavigating
they could have been circumnavigating	

Negación 	
Forma simple 	Forma con V-ing 	Perfecto 	Perfecto con V-ing 	
I couldn't circumnavigate
you couldn't circumnavigate
he couldn't circumnavigate
we couldn't circumnavigate
you couldn't circumnavigate
they couldn't circumnavigate 	I couldn't be circumnavigating
you couldn't be circumnavigating
he couldn't be circumnavigating
we couldn't be circumnavigating
you couldn't be circumnavigating
they couldn't be circumnavigating	I couldn't have circumnavigated
you couldn't have circumnavigated
he couldn't have circumnavigated
we couldn't have circumnavigated
you couldn't have circumnavigated
they couldn't have circumnavigated	I couldn't have been circumnavigating
you couldn't have been circumnavigating
he couldn't have been circumnavigating
we couldn't have been circumnavigating
you couldn't have been circumnavigating
they couldn't have been circumnavigating	

Forma interrogativa 	
Forma simple 	Forma con V-ing 	Perfecto 	Perfecto con V-ing 	
could I circumnavigate?
could you circumnavigate?
could he circumnavigate?
could we circumnavigate?
could you circumnavigate?
could they circumnavigate? 	could I be circumnavigating?
could you be circumnavigating?
could he be circumnavigating?
could we be circumnavigating?
could you be circumnavigating?
could they be circumnavigating? 	could I have circumnavigated?
could you have circumnavigated?
could he have circumnavigated?
could we have circumnavigated?
could you have circumnavigated?
could they have circumnavigated? 	could I have been circumnavigating?
could you have been circumnavigating?
could he have been circumnavigating?
could we have been circumnavigating?
could you have been circumnavigating?
could they have been circumnavigating? 	

Forma interro-negativa 	
Forma simple 	Forma con V-ing 	Perfecto 	Perfecto con V-ing 	
couldn't I circumnavigate?
couldn't you circumnavigate?
couldn't he circumnavigate?
couldn't we circumnavigate?
couldn't you circumnavigate?
couldn't they circumnavigate? 	couldn't I be circumnavigating?
couldn't you be circumnavigating?
couldn't he be circumnavigating?
couldn't we be circumnavigating?
couldn't you be circumnavigating?
couldn't they be circumnavigating? 	couldn't I have circumnavigated?
couldn't you have circumnavigated?
couldn't he have circumnavigated?
couldn't we have circumnavigated?
couldn't you have circumnavigated?
couldn't they have circumnavigated? 	couldn't I have been circumnavigating?
couldn't you have been circumnavigating?
couldn't he have been circumnavigating?
couldn't we have been circumnavigating?
couldn't you have been circumnavigating?
couldn't they have been circumnavigating?