could vacillate
Verbo regular: vacillate - vacillated- vacillated

Afirmación 	
Forma simple 	Forma con V-ing 	Perfecto 	Perfecto con V-ing 	
I could vacillate
you could vacillate
he could vacillate
we could vacillate
you could vacillate
they could vacillate 	I could be vacillating
you could be vacillating
he could be vacillating
we could be vacillating
you could be vacillating
they could be vacillating	I could have vacillated
you could have vacillated
he could have vacillated
we could have vacillated
you could have vacillated
they could have vacillated	I could have been vacillating
you could have been vacillating
he could have been vacillating
we could have been vacillating
you could have been vacillating
they could have been vacillating	

Negación 	
Forma simple 	Forma con V-ing 	Perfecto 	Perfecto con V-ing 	
I could not vacillate
you could not vacillate
he could not vacillate
we could not vacillate
you could not vacillate
they could not vacillate 	I could not be vacillating
you could not be vacillating
he could not be vacillating
we could not be vacillating
you could not be vacillating
they could not be vacillating	I could not have vacillated
you could not have vacillated
he could not have vacillated
we could not have vacillated
you could not have vacillated
they could not have vacillated	I could not have been vacillating
you could not have been vacillating
he could not have been vacillating
we could not have been vacillating
you could not have been vacillating
they could not have been vacillating	

Forma interrogativa 	
Forma simple 	Forma con V-ing 	Perfecto 	Perfecto con V-ing 	
could I vacillate?
could you vacillate?
could he vacillate?
could we vacillate?
could you vacillate?
could they vacillate? 	could I be vacillating?
could you be vacillating?
could he be vacillating?
could we be vacillating?
could you be vacillating?
could they be vacillating? 	could I have vacillated?
could you have vacillated?
could he have vacillated?
could we have vacillated?
could you have vacillated?
could they have vacillated? 	could I have been vacillating?
could you have been vacillating?
could he have been vacillating?
could we have been vacillating?
could you have been vacillating?
could they have been vacillating? 	

Forma interro-negativa 	
Forma simple 	Forma con V-ing 	Perfecto 	Perfecto con V-ing 	
could I not vacillate?
could you not vacillate?
could he not vacillate?
could we not vacillate?
could you not vacillate?
could they not vacillate? 	could I not be vacillating?
could you not be vacillating?
could he not be vacillating?
could we not be vacillating?
could you not be vacillating?
could they not be vacillating? 	could I not have vacillated?
could you not have vacillated?
could he not have vacillated?
could we not have vacillated?
could you not have vacillated?
could they not have vacillated? 	could I not have been vacillating?
could you not have been vacillating?
could he not have been vacillating?
could we not have been vacillating?
could you not have been vacillating?
could they not have been vacillating?