English verb conjugation
COULD SECERN

Regular verb: secern - secerned - secerned

Affirmation

Simple form	V-ing form
I could secern you could secern he could secern we could secern you could secern they could secern	I could be secerning you could be secerning he could be secerning we could be secerning you could be secerning they could be secerning
Perfect	V-ing perfect
I could have secerned you could have secerned he could have secerned we could have secerned you could have secerned they could have secerned	I could have been secerning you could have been secerning he could have been secerning we could have been secerning you could have been secerning they could have been secerning

Negation

Simple form	V-ing form
I could not secern you could not secern he could not secern we could not secern you could not secern they could not secern	I could not be secerning you could not be secerning he could not be secerning we could not be secerning you could not be secerning they could not be secerning
Perfect	V-ing perfect
I could not have secerned you could not have secerned he could not have secerned we could not have secerned you could not have secerned they could not have secerned	I could not have been secerning you could not have been secerning he could not have been secerning we could not have been secerning you could not have been secerning they could not have been secerning

Interrogative form

Simple form	V-ing form
could I secern? could you secern? could he secern? could we secern? could you secern? could they secern?	could I be secerning? could you be secerning? could he be secerning? could we be secerning? could you be secerning? could they be secerning?
Perfect	V-ing perfect
could I have secerned? could you have secerned? could he have secerned? could we have secerned? could you have secerned? could they have secerned?	could I have been secerning? could you have been secerning? could he have been secerning? could we have been secerning? could you have been secerning? could they have been secerning?

Interro-negative form

Simple form	V-ing form
could I not secern? could you not secern? could he not secern? could we not secern? could you not secern? could they not secern?	could I not be secerning? could you not be secerning? could he not be secerning? could we not be secerning? could you not be secerning? could they not be secerning?
Perfect	V-ing perfect
could I not have secerned? could you not have secerned? could he not have secerned? could we not have secerned? could you not have secerned? could they not have secerned?	could I not have been secerning? could you not have been secerning? could he not have been secerning? could we not have been secerning? could you not have been secerning? could they not have been secerning?