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 cannot fall
you cannot fall
she cannot fall
we cannot fall
you cannot fall
they cannot fall 	I cannot be falling
you cannot be falling
she cannot be falling
we cannot be falling
you cannot be falling
they cannot be falling	I cannot have fallen
you cannot have fallen
she cannot have fallen
we cannot have fallen
you cannot have fallen
they cannot have fallen	I cannot have been falling
you cannot have been falling
she cannot have been falling
we cannot have been falling
you cannot have been falling
they cannot 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 I not fall?
can you not fall?
can she not fall?
can we not fall?
can you not fall?
can they not fall? 	can I not be falling?
can you not be falling?
can she not be falling?
can we not be falling?
can you not be falling?
can they not be falling? 	can I not have fallen?
can you not have fallen?
can she not have fallen?
can we not have fallen?
can you not have fallen?
can they not have fallen? 	can I not have been falling?
can you not have been falling?
can she not have been falling?
can we not have been falling?
can you not have been falling?
can they not have been falling?