I can flee you can flee she can flee we can flee you can flee they can flee
V-ing form
I can be fleeing you can be fleeing she can be fleeing we can be fleeing you can be fleeing they can be fleeing
Perfect
I can have fled you can have fled she can have fled we can have fled you can have fled they can have fled
V-ing perfect
I can have been fleeing you can have been fleeing she can have been fleeing we can have been fleeing you can have been fleeing they can have been fleeing
Negation
Simple form
I cannot flee you cannot flee she cannot flee we cannot flee you cannot flee they cannot flee
V-ing form
I cannot be fleeing you cannot be fleeing she cannot be fleeing we cannot be fleeing you cannot be fleeing they cannot be fleeing
Perfect
I cannot have fled you cannot have fled she cannot have fled we cannot have fled you cannot have fled they cannot have fled
V-ing perfect
I cannot have been fleeing you cannot have been fleeing she cannot have been fleeing we cannot have been fleeing you cannot have been fleeing they cannot have been fleeing
Interrogative form
Simple form
can I flee? can you flee? can she flee? can we flee? can you flee? can they flee?
V-ing form
can I be fleeing? can you be fleeing? can she be fleeing? can we be fleeing? can you be fleeing? can they be fleeing?
Perfect
can I have fled? can you have fled? can she have fled? can we have fled? can you have fled? can they have fled?
V-ing perfect
can I have been fleeing? can you have been fleeing? can she have been fleeing? can we have been fleeing? can you have been fleeing? can they have been fleeing?
Interro-negative form
Simple form
can I not flee? can you not flee? can she not flee? can we not flee? can you not flee? can they not flee?
V-ing form
can I not be fleeing? can you not be fleeing? can she not be fleeing? can we not be fleeing? can you not be fleeing? can they not be fleeing?
Perfect
can I not have fled? can you not have fled? can she not have fled? can we not have fled? can you not have fled? can they not have fled?
V-ing perfect
can I not have been fleeing? can you not have been fleeing? can she not have been fleeing? can we not have been fleeing? can you not have been fleeing? can they not have been fleeing?