could predrill
Verbo regular: predrill - predrilled- predrilled

Afirmación 	
Forma simple 	Forma con V-ing 	Perfecto 	Perfecto con V-ing 	
I could predrill
you could predrill
he could predrill
we could predrill
you could predrill
they could predrill 	I could be predrilling
you could be predrilling
he could be predrilling
we could be predrilling
you could be predrilling
they could be predrilling	I could have predrilled
you could have predrilled
he could have predrilled
we could have predrilled
you could have predrilled
they could have predrilled	I could have been predrilling
you could have been predrilling
he could have been predrilling
we could have been predrilling
you could have been predrilling
they could have been predrilling	

Negación 	
Forma simple 	Forma con V-ing 	Perfecto 	Perfecto con V-ing 	
I could not predrill
you could not predrill
he could not predrill
we could not predrill
you could not predrill
they could not predrill 	I could not be predrilling
you could not be predrilling
he could not be predrilling
we could not be predrilling
you could not be predrilling
they could not be predrilling	I could not have predrilled
you could not have predrilled
he could not have predrilled
we could not have predrilled
you could not have predrilled
they could not have predrilled	I could not have been predrilling
you could not have been predrilling
he could not have been predrilling
we could not have been predrilling
you could not have been predrilling
they could not have been predrilling	

Forma interrogativa 	
Forma simple 	Forma con V-ing 	Perfecto 	Perfecto con V-ing 	
could I predrill?
could you predrill?
could he predrill?
could we predrill?
could you predrill?
could they predrill? 	could I be predrilling?
could you be predrilling?
could he be predrilling?
could we be predrilling?
could you be predrilling?
could they be predrilling? 	could I have predrilled?
could you have predrilled?
could he have predrilled?
could we have predrilled?
could you have predrilled?
could they have predrilled? 	could I have been predrilling?
could you have been predrilling?
could he have been predrilling?
could we have been predrilling?
could you have been predrilling?
could they have been predrilling? 	

Forma interro-negativa 	
Forma simple 	Forma con V-ing 	Perfecto 	Perfecto con V-ing 	
could I not predrill?
could you not predrill?
could he not predrill?
could we not predrill?
could you not predrill?
could they not predrill? 	could I not be predrilling?
could you not be predrilling?
could he not be predrilling?
could we not be predrilling?
could you not be predrilling?
could they not be predrilling? 	could I not have predrilled?
could you not have predrilled?
could he not have predrilled?
could we not have predrilled?
could you not have predrilled?
could they not have predrilled? 	could I not have been predrilling?
could you not have been predrilling?
could he not have been predrilling?
could we not have been predrilling?
could you not have been predrilling?
could they not have been predrilling?