English verb conjugation
COULD MOURN

Regular verb: mourn - mourned - mourned

Affirmation

Simple form	V-ing form
I could mourn you could mourn he could mourn we could mourn you could mourn they could mourn	I could be mourning you could be mourning he could be mourning we could be mourning you could be mourning they could be mourning
Perfect	V-ing perfect
I could have mourned you could have mourned he could have mourned we could have mourned you could have mourned they could have mourned	I could have been mourning you could have been mourning he could have been mourning we could have been mourning you could have been mourning they could have been mourning

Negation

Simple form	V-ing form
I could not mourn you could not mourn he could not mourn we could not mourn you could not mourn they could not mourn	I could not be mourning you could not be mourning he could not be mourning we could not be mourning you could not be mourning they could not be mourning
Perfect	V-ing perfect
I could not have mourned you could not have mourned he could not have mourned we could not have mourned you could not have mourned they could not have mourned	I could not have been mourning you could not have been mourning he could not have been mourning we could not have been mourning you could not have been mourning they could not have been mourning

Interrogative form

Simple form	V-ing form
could I mourn? could you mourn? could he mourn? could we mourn? could you mourn? could they mourn?	could I be mourning? could you be mourning? could he be mourning? could we be mourning? could you be mourning? could they be mourning?
Perfect	V-ing perfect
could I have mourned? could you have mourned? could he have mourned? could we have mourned? could you have mourned? could they have mourned?	could I have been mourning? could you have been mourning? could he have been mourning? could we have been mourning? could you have been mourning? could they have been mourning?

Interro-negative form

Simple form	V-ing form
could I not mourn? could you not mourn? could he not mourn? could we not mourn? could you not mourn? could they not mourn?	could I not be mourning? could you not be mourning? could he not be mourning? could we not be mourning? could you not be mourning? could they not be mourning?
Perfect	V-ing perfect
could I not have mourned? could you not have mourned? could he not have mourned? could we not have mourned? could you not have mourned? could they not have mourned?	could I not have been mourning? could you not have been mourning? could he not have been mourning? could we not have been mourning? could you not have been mourning? could they not have been mourning?