could flash
Verbo regular: flash - flashed- flashed

Afirmação 	
Forma simple 	Forma com V-ing 	Perfeito 	Perfeito com V-ing 	
I could flash
you could flash
he could flash
we could flash
you could flash
they could flash 	I could be flashing
you could be flashing
he could be flashing
we could be flashing
you could be flashing
they could be flashing	I could have flashed
you could have flashed
he could have flashed
we could have flashed
you could have flashed
they could have flashed	I could have been flashing
you could have been flashing
he could have been flashing
we could have been flashing
you could have been flashing
they could have been flashing	

Negação 	
Forma simple 	Forma com V-ing 	Perfeito 	Perfeito com V-ing 	
I could not flash
you could not flash
he could not flash
we could not flash
you could not flash
they could not flash 	I could not be flashing
you could not be flashing
he could not be flashing
we could not be flashing
you could not be flashing
they could not be flashing	I could not have flashed
you could not have flashed
he could not have flashed
we could not have flashed
you could not have flashed
they could not have flashed	I could not have been flashing
you could not have been flashing
he could not have been flashing
we could not have been flashing
you could not have been flashing
they could not have been flashing	

Forma interrogativa 	
Forma simple 	Forma com V-ing 	Perfeito 	Perfeito com V-ing 	
could I flash?
could you flash?
could he flash?
could we flash?
could you flash?
could they flash? 	could I be flashing?
could you be flashing?
could he be flashing?
could we be flashing?
could you be flashing?
could they be flashing? 	could I have flashed?
could you have flashed?
could he have flashed?
could we have flashed?
could you have flashed?
could they have flashed? 	could I have been flashing?
could you have been flashing?
could he have been flashing?
could we have been flashing?
could you have been flashing?
could they have been flashing? 	

Forma interro-Negação 	
Forma simple 	Forma com V-ing 	Perfeito 	Perfeito com V-ing 	
could I not flash?
could you not flash?
could he not flash?
could we not flash?
could you not flash?
could they not flash? 	could I not be flashing?
could you not be flashing?
could he not be flashing?
could we not be flashing?
could you not be flashing?
could they not be flashing? 	could I not have flashed?
could you not have flashed?
could he not have flashed?
could we not have flashed?
could you not have flashed?
could they not have flashed? 	could I not have been flashing?
could you not have been flashing?
could he not have been flashing?
could we not have been flashing?
could you not have been flashing?
could they not have been flashing?