can flush
Regular verb: flush - flushed- flushed

Affirmation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I can flush
you can flush
she can flush
we can flush
you can flush
they can flush 	I can be flushing
you can be flushing
she can be flushing
we can be flushing
you can be flushing
they can be flushing	I can have flushed
you can have flushed
she can have flushed
we can have flushed
you can have flushed
they can have flushed	I can have been flushing
you can have been flushing
she can have been flushing
we can have been flushing
you can have been flushing
they can have been flushing	

Negation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I cannot flush
you cannot flush
she cannot flush
we cannot flush
you cannot flush
they cannot flush 	I cannot be flushing
you cannot be flushing
she cannot be flushing
we cannot be flushing
you cannot be flushing
they cannot be flushing	I cannot have flushed
you cannot have flushed
she cannot have flushed
we cannot have flushed
you cannot have flushed
they cannot have flushed	I cannot have been flushing
you cannot have been flushing
she cannot have been flushing
we cannot have been flushing
you cannot have been flushing
they cannot have been flushing	

Interrogative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
can I flush?
can you flush?
can she flush?
can we flush?
can you flush?
can they flush? 	can I be flushing?
can you be flushing?
can she be flushing?
can we be flushing?
can you be flushing?
can they be flushing? 	can I have flushed?
can you have flushed?
can she have flushed?
can we have flushed?
can you have flushed?
can they have flushed? 	can I have been flushing?
can you have been flushing?
can she have been flushing?
can we have been flushing?
can you have been flushing?
can they have been flushing? 	

Interro-negative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
can I not flush?
can you not flush?
can she not flush?
can we not flush?
can you not flush?
can they not flush? 	can I not be flushing?
can you not be flushing?
can she not be flushing?
can we not be flushing?
can you not be flushing?
can they not be flushing? 	can I not have flushed?
can you not have flushed?
can she not have flushed?
can we not have flushed?
can you not have flushed?
can they not have flushed? 	can I not have been flushing?
can you not have been flushing?
can she not have been flushing?
can we not have been flushing?
can you not have been flushing?
can they not have been flushing?