could masturbate
Verbo regular: masturbate - masturbated- masturbated

Afirmação 	
Forma simple 	Forma com V-ing 	Perfeito 	Perfeito com V-ing 	
I could masturbate
you could masturbate
he could masturbate
we could masturbate
you could masturbate
they could masturbate 	I could be masturbating
you could be masturbating
he could be masturbating
we could be masturbating
you could be masturbating
they could be masturbating	I could have masturbated
you could have masturbated
he could have masturbated
we could have masturbated
you could have masturbated
they could have masturbated	I could have been masturbating
you could have been masturbating
he could have been masturbating
we could have been masturbating
you could have been masturbating
they could have been masturbating	

Negação 	
Forma simple 	Forma com V-ing 	Perfeito 	Perfeito com V-ing 	
I could not masturbate
you could not masturbate
he could not masturbate
we could not masturbate
you could not masturbate
they could not masturbate 	I could not be masturbating
you could not be masturbating
he could not be masturbating
we could not be masturbating
you could not be masturbating
they could not be masturbating	I could not have masturbated
you could not have masturbated
he could not have masturbated
we could not have masturbated
you could not have masturbated
they could not have masturbated	I could not have been masturbating
you could not have been masturbating
he could not have been masturbating
we could not have been masturbating
you could not have been masturbating
they could not have been masturbating	

Forma interrogativa 	
Forma simple 	Forma com V-ing 	Perfeito 	Perfeito com V-ing 	
could I masturbate?
could you masturbate?
could he masturbate?
could we masturbate?
could you masturbate?
could they masturbate? 	could I be masturbating?
could you be masturbating?
could he be masturbating?
could we be masturbating?
could you be masturbating?
could they be masturbating? 	could I have masturbated?
could you have masturbated?
could he have masturbated?
could we have masturbated?
could you have masturbated?
could they have masturbated? 	could I have been masturbating?
could you have been masturbating?
could he have been masturbating?
could we have been masturbating?
could you have been masturbating?
could they have been masturbating? 	

Forma interro-Negação 	
Forma simple 	Forma com V-ing 	Perfeito 	Perfeito com V-ing 	
could I not masturbate?
could you not masturbate?
could he not masturbate?
could we not masturbate?
could you not masturbate?
could they not masturbate? 	could I not be masturbating?
could you not be masturbating?
could he not be masturbating?
could we not be masturbating?
could you not be masturbating?
could they not be masturbating? 	could I not have masturbated?
could you not have masturbated?
could he not have masturbated?
could we not have masturbated?
could you not have masturbated?
could they not have masturbated? 	could I not have been masturbating?
could you not have been masturbating?
could he not have been masturbating?
could we not have been masturbating?
could you not have been masturbating?
could they not have been masturbating?