can floss
Regular verb: floss - flossed- flossed

Affirmation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I can floss
you can floss
she can floss
we can floss
you can floss
they can floss 	I can be flossing
you can be flossing
she can be flossing
we can be flossing
you can be flossing
they can be flossing	I can have flossed
you can have flossed
she can have flossed
we can have flossed
you can have flossed
they can have flossed	I can have been flossing
you can have been flossing
she can have been flossing
we can have been flossing
you can have been flossing
they can have been flossing	

Negation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I cannot floss
you cannot floss
she cannot floss
we cannot floss
you cannot floss
they cannot floss 	I cannot be flossing
you cannot be flossing
she cannot be flossing
we cannot be flossing
you cannot be flossing
they cannot be flossing	I cannot have flossed
you cannot have flossed
she cannot have flossed
we cannot have flossed
you cannot have flossed
they cannot have flossed	I cannot have been flossing
you cannot have been flossing
she cannot have been flossing
we cannot have been flossing
you cannot have been flossing
they cannot have been flossing	

Interrogative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
can I floss?
can you floss?
can she floss?
can we floss?
can you floss?
can they floss? 	can I be flossing?
can you be flossing?
can she be flossing?
can we be flossing?
can you be flossing?
can they be flossing? 	can I have flossed?
can you have flossed?
can she have flossed?
can we have flossed?
can you have flossed?
can they have flossed? 	can I have been flossing?
can you have been flossing?
can she have been flossing?
can we have been flossing?
can you have been flossing?
can they have been flossing? 	

Interro-negative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
can I not floss?
can you not floss?
can she not floss?
can we not floss?
can you not floss?
can they not floss? 	can I not be flossing?
can you not be flossing?
can she not be flossing?
can we not be flossing?
can you not be flossing?
can they not be flossing? 	can I not have flossed?
can you not have flossed?
can she not have flossed?
can we not have flossed?
can you not have flossed?
can they not have flossed? 	can I not have been flossing?
can you not have been flossing?
can she not have been flossing?
can we not have been flossing?
can you not have been flossing?
can they not have been flossing?