English verb conjugation
COULD FRIT

Regular verb: frit - frited - frited

Affirmation

Simple form	V-ing form
I could frit you could frit he could frit we could frit you could frit they could frit	I could be friting you could be friting he could be friting we could be friting you could be friting they could be friting
Perfect	V-ing perfect
I could have frited you could have frited he could have frited we could have frited you could have frited they could have frited	I could have been friting you could have been friting he could have been friting we could have been friting you could have been friting they could have been friting

Negation

Simple form	V-ing form
I could not frit you could not frit he could not frit we could not frit you could not frit they could not frit	I could not be friting you could not be friting he could not be friting we could not be friting you could not be friting they could not be friting
Perfect	V-ing perfect
I could not have frited you could not have frited he could not have frited we could not have frited you could not have frited they could not have frited	I could not have been friting you could not have been friting he could not have been friting we could not have been friting you could not have been friting they could not have been friting

Interrogative form

Simple form	V-ing form
could I frit? could you frit? could he frit? could we frit? could you frit? could they frit?	could I be friting? could you be friting? could he be friting? could we be friting? could you be friting? could they be friting?
Perfect	V-ing perfect
could I have frited? could you have frited? could he have frited? could we have frited? could you have frited? could they have frited?	could I have been friting? could you have been friting? could he have been friting? could we have been friting? could you have been friting? could they have been friting?

Interro-negative form

Simple form	V-ing form
could I not frit? could you not frit? could he not frit? could we not frit? could you not frit? could they not frit?	could I not be friting? could you not be friting? could he not be friting? could we not be friting? could you not be friting? could they not be friting?
Perfect	V-ing perfect
could I not have frited? could you not have frited? could he not have frited? could we not have frited? could you not have frited? could they not have frited?	could I not have been friting? could you not have been friting? could he not have been friting? could we not have been friting? could you not have been friting? could they not have been friting?