could litigate
Verbo regular: litigate - litigated- litigated

Afirmación 	
Forma simple 	Forma con V-ing 	Perfecto 	Perfecto con V-ing 	
I could litigate
you could litigate
he could litigate
we could litigate
you could litigate
they could litigate 	I could be litigating
you could be litigating
he could be litigating
we could be litigating
you could be litigating
they could be litigating	I could have litigated
you could have litigated
he could have litigated
we could have litigated
you could have litigated
they could have litigated	I could have been litigating
you could have been litigating
he could have been litigating
we could have been litigating
you could have been litigating
they could have been litigating	

Negación 	
Forma simple 	Forma con V-ing 	Perfecto 	Perfecto con V-ing 	
I couldn't litigate
you couldn't litigate
he couldn't litigate
we couldn't litigate
you couldn't litigate
they couldn't litigate 	I couldn't be litigating
you couldn't be litigating
he couldn't be litigating
we couldn't be litigating
you couldn't be litigating
they couldn't be litigating	I couldn't have litigated
you couldn't have litigated
he couldn't have litigated
we couldn't have litigated
you couldn't have litigated
they couldn't have litigated	I couldn't have been litigating
you couldn't have been litigating
he couldn't have been litigating
we couldn't have been litigating
you couldn't have been litigating
they couldn't have been litigating	

Forma interrogativa 	
Forma simple 	Forma con V-ing 	Perfecto 	Perfecto con V-ing 	
could I litigate?
could you litigate?
could he litigate?
could we litigate?
could you litigate?
could they litigate? 	could I be litigating?
could you be litigating?
could he be litigating?
could we be litigating?
could you be litigating?
could they be litigating? 	could I have litigated?
could you have litigated?
could he have litigated?
could we have litigated?
could you have litigated?
could they have litigated? 	could I have been litigating?
could you have been litigating?
could he have been litigating?
could we have been litigating?
could you have been litigating?
could they have been litigating? 	

Forma interro-negativa 	
Forma simple 	Forma con V-ing 	Perfecto 	Perfecto con V-ing 	
couldn't I litigate?
couldn't you litigate?
couldn't he litigate?
couldn't we litigate?
couldn't you litigate?
couldn't they litigate? 	couldn't I be litigating?
couldn't you be litigating?
couldn't he be litigating?
couldn't we be litigating?
couldn't you be litigating?
couldn't they be litigating? 	couldn't I have litigated?
couldn't you have litigated?
couldn't he have litigated?
couldn't we have litigated?
couldn't you have litigated?
couldn't they have litigated? 	couldn't I have been litigating?
couldn't you have been litigating?
couldn't he have been litigating?
couldn't we have been litigating?
couldn't you have been litigating?
couldn't they have been litigating?