could mastermind
Verbo regular: mastermind - masterminded- masterminded

Afirmación 	
Forma simple 	Forma con V-ing 	Perfecto 	Perfecto con V-ing 	
I could mastermind
you could mastermind
he could mastermind
we could mastermind
you could mastermind
they could mastermind 	I could be masterminding
you could be masterminding
he could be masterminding
we could be masterminding
you could be masterminding
they could be masterminding	I could have masterminded
you could have masterminded
he could have masterminded
we could have masterminded
you could have masterminded
they could have masterminded	I could have been masterminding
you could have been masterminding
he could have been masterminding
we could have been masterminding
you could have been masterminding
they could have been masterminding	

Negación 	
Forma simple 	Forma con V-ing 	Perfecto 	Perfecto con V-ing 	
I couldn't mastermind
you couldn't mastermind
he couldn't mastermind
we couldn't mastermind
you couldn't mastermind
they couldn't mastermind 	I couldn't be masterminding
you couldn't be masterminding
he couldn't be masterminding
we couldn't be masterminding
you couldn't be masterminding
they couldn't be masterminding	I couldn't have masterminded
you couldn't have masterminded
he couldn't have masterminded
we couldn't have masterminded
you couldn't have masterminded
they couldn't have masterminded	I couldn't have been masterminding
you couldn't have been masterminding
he couldn't have been masterminding
we couldn't have been masterminding
you couldn't have been masterminding
they couldn't have been masterminding	

Forma interrogativa 	
Forma simple 	Forma con V-ing 	Perfecto 	Perfecto con V-ing 	
could I mastermind?
could you mastermind?
could he mastermind?
could we mastermind?
could you mastermind?
could they mastermind? 	could I be masterminding?
could you be masterminding?
could he be masterminding?
could we be masterminding?
could you be masterminding?
could they be masterminding? 	could I have masterminded?
could you have masterminded?
could he have masterminded?
could we have masterminded?
could you have masterminded?
could they have masterminded? 	could I have been masterminding?
could you have been masterminding?
could he have been masterminding?
could we have been masterminding?
could you have been masterminding?
could they have been masterminding? 	

Forma interro-negativa 	
Forma simple 	Forma con V-ing 	Perfecto 	Perfecto con V-ing 	
couldn't I mastermind?
couldn't you mastermind?
couldn't he mastermind?
couldn't we mastermind?
couldn't you mastermind?
couldn't they mastermind? 	couldn't I be masterminding?
couldn't you be masterminding?
couldn't he be masterminding?
couldn't we be masterminding?
couldn't you be masterminding?
couldn't they be masterminding? 	couldn't I have masterminded?
couldn't you have masterminded?
couldn't he have masterminded?
couldn't we have masterminded?
couldn't you have masterminded?
couldn't they have masterminded? 	couldn't I have been masterminding?
couldn't you have been masterminding?
couldn't he have been masterminding?
couldn't we have been masterminding?
couldn't you have been masterminding?
couldn't they have been masterminding?