can fall
Irregular verb: fall - fell- fallen

Affirmation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I can fall
you can fall
she can fall
we can fall
you can fall
they can fall 	I can be falling
you can be falling
she can be falling
we can be falling
you can be falling
they can be falling	I can have fallen
you can have fallen
she can have fallen
we can have fallen
you can have fallen
they can have fallen	I can have been falling
you can have been falling
she can have been falling
we can have been falling
you can have been falling
they can have been falling	

Negation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I can't fall
you can't fall
she can't fall
we can't fall
you can't fall
they can't fall 	I can't be falling
you can't be falling
she can't be falling
we can't be falling
you can't be falling
they can't be falling	I can't have fallen
you can't have fallen
she can't have fallen
we can't have fallen
you can't have fallen
they can't have fallen	I can't have been falling
you can't have been falling
she can't have been falling
we can't have been falling
you can't have been falling
they can't have been falling	

Interrogative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
can I fall?
can you fall?
can she fall?
can we fall?
can you fall?
can they fall? 	can I be falling?
can you be falling?
can she be falling?
can we be falling?
can you be falling?
can they be falling? 	can I have fallen?
can you have fallen?
can she have fallen?
can we have fallen?
can you have fallen?
can they have fallen? 	can I have been falling?
can you have been falling?
can she have been falling?
can we have been falling?
can you have been falling?
can they have been falling? 	

Interro-negative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
can't I fall?
can't you fall?
can't she fall?
can't we fall?
can't you fall?
can't they fall? 	can't I be falling?
can't you be falling?
can't she be falling?
can't we be falling?
can't you be falling?
can't they be falling? 	can't I have fallen?
can't you have fallen?
can't she have fallen?
can't we have fallen?
can't you have fallen?
can't they have fallen? 	can't I have been falling?
can't you have been falling?
can't she have been falling?
can't we have been falling?
can't you have been falling?
can't they have been falling?