English verb conjugation
CAN SECERN

Regular verb: secern - secerned - secerned

Affirmation

Simple form	V-ing form
I can secern you can secern he can secern we can secern you can secern they can secern	I can be secerning you can be secerning he can be secerning we can be secerning you can be secerning they can be secerning
Perfect	V-ing perfect
I can have secerned you can have secerned he 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 he 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
I can't secern you can't secern he can't secern we can't secern you can't secern they can't secern	I can't be secerning you can't be secerning he can't be secerning we can't be secerning you can't be secerning they can't be secerning
Perfect	V-ing perfect
I can't have secerned you can't have secerned he can't have secerned we can't have secerned you can't have secerned they can't have secerned	I can't have been secerning you can't have been secerning he can't have been secerning we can't have been secerning you can't have been secerning they can't have been secerning

Interrogative form

Simple form	V-ing form
can I secern? can you secern? can he secern? can we secern? can you secern? can they secern?	can I be secerning? can you be secerning? can he be secerning? can we be secerning? can you be secerning? can they be secerning?
Perfect	V-ing perfect
can I have secerned? can you have secerned? can he 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 he 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
can't I secern? can't you secern? can't he secern? can't we secern? can't you secern? can't they secern?	can't I be secerning? can't you be secerning? can't he be secerning? can't we be secerning? can't you be secerning? can't they be secerning?
Perfect	V-ing perfect
can't I have secerned? can't you have secerned? can't he have secerned? can't we have secerned? can't you have secerned? can't they have secerned?	can't I have been secerning? can't you have been secerning? can't he have been secerning? can't we have been secerning? can't you have been secerning? can't they have been secerning?