can secern
Regular verb: secern - secerned- secerned

Affirmation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I can secern
you can secern
she can secern
we can secern
you can secern
they can secern 	I can be secerning
you can be secerning
she can be secerning
we can be secerning
you can be secerning
they can be secerning	I can have secerned
you can have secerned
she can have secerned
we can have secerned
you can have secerned
they can have secerned	I can have been secerning
you can have been secerning
she can have been secerning
we can have been secerning
you can have been secerning
they can have been secerning	

Negation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I cannot secern
you cannot secern
she cannot secern
we cannot secern
you cannot secern
they cannot secern 	I cannot be secerning
you cannot be secerning
she cannot be secerning
we cannot be secerning
you cannot be secerning
they cannot be secerning	I cannot have secerned
you cannot have secerned
she cannot have secerned
we cannot have secerned
you cannot have secerned
they cannot have secerned	I cannot have been secerning
you cannot have been secerning
she cannot have been secerning
we cannot have been secerning
you cannot have been secerning
they cannot have been secerning	

Interrogative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
can I secern?
can you secern?
can she secern?
can we secern?
can you secern?
can they secern? 	can I be secerning?
can you be secerning?
can she be secerning?
can we be secerning?
can you be secerning?
can they be secerning? 	can I have secerned?
can you have secerned?
can she have secerned?
can we have secerned?
can you have secerned?
can they have secerned? 	can I have been secerning?
can you have been secerning?
can she have been secerning?
can we have been secerning?
can you have been secerning?
can they have been secerning? 	

Interro-negative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
can I not secern?
can you not secern?
can she not secern?
can we not secern?
can you not secern?
can they not secern? 	can I not be secerning?
can you not be secerning?
can she not be secerning?
can we not be secerning?
can you not be secerning?
can they not be secerning? 	can I not have secerned?
can you not have secerned?
can she not have secerned?
can we not have secerned?
can you not have secerned?
can they not have secerned? 	can I not have been secerning?
can you not have been secerning?
can she not have been secerning?
can we not have been secerning?
can you not have been secerning?
can they not have been secerning?