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
she could fluctuate
we could fluctuate
you could fluctuate
they could fluctuate 	I could be fluctuating
you could be fluctuating
she could be fluctuating
we could be fluctuating
you could be fluctuating
they could be fluctuating	I could have fluctuated
you could have fluctuated
she 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
she 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
she 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
she 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
she 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
she 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 she fluctuate?
could we fluctuate?
could you fluctuate?
could they fluctuate? 	could I be fluctuating?
could you be fluctuating?
could she be fluctuating?
could we be fluctuating?
could you be fluctuating?
could they be fluctuating? 	could I have fluctuated?
could you have fluctuated?
could she 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 she 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 she 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 she 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 she 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 she not have been fluctuating?
could we not have been fluctuating?
could you not have been fluctuating?
could they not have been fluctuating?