English verb conjugation
COULD SECERN

Regular verb: secern - secerned - secerned

Affirmation

Simple form	V-ing form
I could secern you could secern she could secern we could secern you could secern they could secern	I could be secerning you could be secerning she 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 she 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 she 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 couldn't secern you couldn't secern she couldn't secern we couldn't secern you couldn't secern they couldn't secern	I couldn't be secerning you couldn't be secerning she couldn't be secerning we couldn't be secerning you couldn't be secerning they couldn't be secerning
Perfect	V-ing perfect
I couldn't have secerned you couldn't have secerned she couldn't have secerned we couldn't have secerned you couldn't have secerned they couldn't have secerned	I couldn't have been secerning you couldn't have been secerning she couldn't have been secerning we couldn't have been secerning you couldn't have been secerning they couldn't have been secerning

Interrogative form

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