could fluctuate
Verbo regular: fluctuate - fluctuated- fluctuated

Afirmação 	
Forma simple 	Forma com V-ing 	Perfeito 	Perfeito com V-ing 	
I could fluctuate
you could fluctuate
he could fluctuate
we could fluctuate
you could fluctuate
they could fluctuate 	I could be fluctuating
you could be fluctuating
he could be fluctuating
we could be fluctuating
you could be fluctuating
they could be fluctuating	I could have fluctuated
you could have fluctuated
he could have fluctuated
we could have fluctuated
you could have fluctuated
they could have fluctuated	I could have been fluctuating
you could have been fluctuating
he could have been fluctuating
we could have been fluctuating
you could have been fluctuating
they could have been fluctuating	

Negação 	
Forma simple 	Forma com V-ing 	Perfeito 	Perfeito com V-ing 	
I could not fluctuate
you could not fluctuate
he could not fluctuate
we could not fluctuate
you could not fluctuate
they could not fluctuate 	I could not be fluctuating
you could not be fluctuating
he could not be fluctuating
we could not be fluctuating
you could not be fluctuating
they could not be fluctuating	I could not have fluctuated
you could not have fluctuated
he could not have fluctuated
we could not have fluctuated
you could not have fluctuated
they could not have fluctuated	I could not have been fluctuating
you could not have been fluctuating
he could not have been fluctuating
we could not have been fluctuating
you could not have been fluctuating
they could not have been fluctuating	

Forma interrogativa 	
Forma simple 	Forma com V-ing 	Perfeito 	Perfeito com V-ing 	
could I fluctuate?
could you fluctuate?
could he fluctuate?
could we fluctuate?
could you fluctuate?
could they fluctuate? 	could I be fluctuating?
could you be fluctuating?
could he be fluctuating?
could we be fluctuating?
could you be fluctuating?
could they be fluctuating? 	could I have fluctuated?
could you have fluctuated?
could he have fluctuated?
could we have fluctuated?
could you have fluctuated?
could they have fluctuated? 	could I have been fluctuating?
could you have been fluctuating?
could he have been fluctuating?
could we have been fluctuating?
could you have been fluctuating?
could they have been fluctuating? 	

Forma interro-Negação 	
Forma simple 	Forma com V-ing 	Perfeito 	Perfeito com V-ing 	
could I not fluctuate?
could you not fluctuate?
could he not fluctuate?
could we not fluctuate?
could you not fluctuate?
could they not fluctuate? 	could I not be fluctuating?
could you not be fluctuating?
could he not be fluctuating?
could we not be fluctuating?
could you not be fluctuating?
could they not be fluctuating? 	could I not have fluctuated?
could you not have fluctuated?
could he not have fluctuated?
could we not have fluctuated?
could you not have fluctuated?
could they not have fluctuated? 	could I not have been fluctuating?
could you not have been fluctuating?
could he not have been fluctuating?
could we not have been fluctuating?
could you not have been fluctuating?
could they not have been fluctuating?