could ligate
Regular verb: ligate - ligated- ligated

Affirmation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I could ligate
you could ligate
he could ligate
we could ligate
you could ligate
they could ligate 	I could be ligating
you could be ligating
he could be ligating
we could be ligating
you could be ligating
they could be ligating	I could have ligated
you could have ligated
he could have ligated
we could have ligated
you could have ligated
they could have ligated	I could have been ligating
you could have been ligating
he could have been ligating
we could have been ligating
you could have been ligating
they could have been ligating	

Negation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I could not ligate
you could not ligate
he could not ligate
we could not ligate
you could not ligate
they could not ligate 	I could not be ligating
you could not be ligating
he could not be ligating
we could not be ligating
you could not be ligating
they could not be ligating	I could not have ligated
you could not have ligated
he could not have ligated
we could not have ligated
you could not have ligated
they could not have ligated	I could not have been ligating
you could not have been ligating
he could not have been ligating
we could not have been ligating
you could not have been ligating
they could not have been ligating	

Interrogative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
could I ligate?
could you ligate?
could he ligate?
could we ligate?
could you ligate?
could they ligate? 	could I be ligating?
could you be ligating?
could he be ligating?
could we be ligating?
could you be ligating?
could they be ligating? 	could I have ligated?
could you have ligated?
could he have ligated?
could we have ligated?
could you have ligated?
could they have ligated? 	could I have been ligating?
could you have been ligating?
could he have been ligating?
could we have been ligating?
could you have been ligating?
could they have been ligating? 	

Interro-negative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
could I not ligate?
could you not ligate?
could he not ligate?
could we not ligate?
could you not ligate?
could they not ligate? 	could I not be ligating?
could you not be ligating?
could he not be ligating?
could we not be ligating?
could you not be ligating?
could they not be ligating? 	could I not have ligated?
could you not have ligated?
could he not have ligated?
could we not have ligated?
could you not have ligated?
could they not have ligated? 	could I not have been ligating?
could you not have been ligating?
could he not have been ligating?
could we not have been ligating?
could you not have been ligating?
could they not have been ligating?