can confirm
Regular verb: confirm - confirmed- confirmed

Affirmation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I can confirm
you can confirm
he can confirm
we can confirm
you can confirm
they can confirm 	I can be confirming
you can be confirming
he can be confirming
we can be confirming
you can be confirming
they can be confirming	I can have confirmed
you can have confirmed
he can have confirmed
we can have confirmed
you can have confirmed
they can have confirmed	I can have been confirming
you can have been confirming
he can have been confirming
we can have been confirming
you can have been confirming
they can have been confirming	

Negation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I cannot confirm
you cannot confirm
he cannot confirm
we cannot confirm
you cannot confirm
they cannot confirm 	I cannot be confirming
you cannot be confirming
he cannot be confirming
we cannot be confirming
you cannot be confirming
they cannot be confirming	I cannot have confirmed
you cannot have confirmed
he cannot have confirmed
we cannot have confirmed
you cannot have confirmed
they cannot have confirmed	I cannot have been confirming
you cannot have been confirming
he cannot have been confirming
we cannot have been confirming
you cannot have been confirming
they cannot have been confirming	

Interrogative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
can I confirm?
can you confirm?
can he confirm?
can we confirm?
can you confirm?
can they confirm? 	can I be confirming?
can you be confirming?
can he be confirming?
can we be confirming?
can you be confirming?
can they be confirming? 	can I have confirmed?
can you have confirmed?
can he have confirmed?
can we have confirmed?
can you have confirmed?
can they have confirmed? 	can I have been confirming?
can you have been confirming?
can he have been confirming?
can we have been confirming?
can you have been confirming?
can they have been confirming? 	

Interro-negative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
can I not confirm?
can you not confirm?
can he not confirm?
can we not confirm?
can you not confirm?
can they not confirm? 	can I not be confirming?
can you not be confirming?
can he not be confirming?
can we not be confirming?
can you not be confirming?
can they not be confirming? 	can I not have confirmed?
can you not have confirmed?
can he not have confirmed?
can we not have confirmed?
can you not have confirmed?
can they not have confirmed? 	can I not have been confirming?
can you not have been confirming?
can he not have been confirming?
can we not have been confirming?
can you not have been confirming?
can they not have been confirming?