can flash
Regular verb: flash - flashed- flashed

Affirmation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I can flash
you can flash
he can flash
we can flash
you can flash
they can flash 	I can be flashing
you can be flashing
he can be flashing
we can be flashing
you can be flashing
they can be flashing	I can have flashed
you can have flashed
he can have flashed
we can have flashed
you can have flashed
they can have flashed	I can have been flashing
you can have been flashing
he can have been flashing
we can have been flashing
you can have been flashing
they can have been flashing	

Negation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I can't flash
you can't flash
he can't flash
we can't flash
you can't flash
they can't flash 	I can't be flashing
you can't be flashing
he can't be flashing
we can't be flashing
you can't be flashing
they can't be flashing	I can't have flashed
you can't have flashed
he can't have flashed
we can't have flashed
you can't have flashed
they can't have flashed	I can't have been flashing
you can't have been flashing
he can't have been flashing
we can't have been flashing
you can't have been flashing
they can't have been flashing	

Interrogative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
can I flash?
can you flash?
can he flash?
can we flash?
can you flash?
can they flash? 	can I be flashing?
can you be flashing?
can he be flashing?
can we be flashing?
can you be flashing?
can they be flashing? 	can I have flashed?
can you have flashed?
can he have flashed?
can we have flashed?
can you have flashed?
can they have flashed? 	can I have been flashing?
can you have been flashing?
can he have been flashing?
can we have been flashing?
can you have been flashing?
can they have been flashing? 	

Interro-negative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
can't I flash?
can't you flash?
can't he flash?
can't we flash?
can't you flash?
can't they flash? 	can't I be flashing?
can't you be flashing?
can't he be flashing?
can't we be flashing?
can't you be flashing?
can't they be flashing? 	can't I have flashed?
can't you have flashed?
can't he have flashed?
can't we have flashed?
can't you have flashed?
can't they have flashed? 	can't I have been flashing?
can't you have been flashing?
can't he have been flashing?
can't we have been flashing?
can't you have been flashing?
can't they have been flashing?