Warning, this verb may not exist. Conjugation is given as example.
Affirmation
Simple form
I could flee flee you could flee flee he could flee flee we could flee flee you could flee flee they could flee flee
V-ing form
I could be flee fleeing you could be flee fleeing he could be flee fleeing we could be flee fleeing you could be flee fleeing they could be flee fleeing
Perfect
I could have flee fleed you could have flee fleed he could have flee fleed we could have flee fleed you could have flee fleed they could have flee fleed
V-ing perfect
I could have been flee fleeing you could have been flee fleeing he could have been flee fleeing we could have been flee fleeing you could have been flee fleeing they could have been flee fleeing
Negation
Simple form
I could not flee flee you could not flee flee he could not flee flee we could not flee flee you could not flee flee they could not flee flee
V-ing form
I could not be flee fleeing you could not be flee fleeing he could not be flee fleeing we could not be flee fleeing you could not be flee fleeing they could not be flee fleeing
Perfect
I could not have flee fleed you could not have flee fleed he could not have flee fleed we could not have flee fleed you could not have flee fleed they could not have flee fleed
V-ing perfect
I could not have been flee fleeing you could not have been flee fleeing he could not have been flee fleeing we could not have been flee fleeing you could not have been flee fleeing they could not have been flee fleeing
Interrogative form
Simple form
could I flee flee? could you flee flee? could he flee flee? could we flee flee? could you flee flee? could they flee flee?
V-ing form
could I be flee fleeing? could you be flee fleeing? could he be flee fleeing? could we be flee fleeing? could you be flee fleeing? could they be flee fleeing?
Perfect
could I have flee fleed? could you have flee fleed? could he have flee fleed? could we have flee fleed? could you have flee fleed? could they have flee fleed?
V-ing perfect
could I have been flee fleeing? could you have been flee fleeing? could he have been flee fleeing? could we have been flee fleeing? could you have been flee fleeing? could they have been flee fleeing?
Interro-negative form
Simple form
could I not flee flee? could you not flee flee? could he not flee flee? could we not flee flee? could you not flee flee? could they not flee flee?
V-ing form
could I not be flee fleeing? could you not be flee fleeing? could he not be flee fleeing? could we not be flee fleeing? could you not be flee fleeing? could they not be flee fleeing?
Perfect
could I not have flee fleed? could you not have flee fleed? could he not have flee fleed? could we not have flee fleed? could you not have flee fleed? could they not have flee fleed?
V-ing perfect
could I not have been flee fleeing? could you not have been flee fleeing? could he not have been flee fleeing? could we not have been flee fleeing? could you not have been flee fleeing? could they not have been flee fleeing?