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 can't flee you can't flee she can't flee we can't flee you can't flee they can't flee
V-ing form
I can't be fleeing you can't be fleeing she can't be fleeing we can't be fleeing you can't be fleeing they can't be fleeing
Perfect
I can't have fled you can't have fled she can't have fled we can't have fled you can't have fled they can't have fled
V-ing perfect
I can't have been fleeing you can't have been fleeing she can't have been fleeing we can't have been fleeing you can't have been fleeing they can't 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't I flee? can't you flee? can't she flee? can't we flee? can't you flee? can't they flee?
V-ing form
can't I be fleeing? can't you be fleeing? can't she be fleeing? can't we be fleeing? can't you be fleeing? can't they be fleeing?
Perfect
can't I have fled? can't you have fled? can't she have fled? can't we have fled? can't you have fled? can't they have fled?
V-ing perfect
can't I have been fleeing? can't you have been fleeing? can't she have been fleeing? can't we have been fleeing? can't you have been fleeing? can't they have been fleeing?