can file
Regular verb: file - filed- filed

Affirmation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I can file
you can file
she can file
we can file
you can file
they can file 	I can be filing
you can be filing
she can be filing
we can be filing
you can be filing
they can be filing	I can have filed
you can have filed
she can have filed
we can have filed
you can have filed
they can have filed	I can have been filing
you can have been filing
she can have been filing
we can have been filing
you can have been filing
they can have been filing	

Negation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I can't file
you can't file
she can't file
we can't file
you can't file
they can't file 	I can't be filing
you can't be filing
she can't be filing
we can't be filing
you can't be filing
they can't be filing	I can't have filed
you can't have filed
she can't have filed
we can't have filed
you can't have filed
they can't have filed	I can't have been filing
you can't have been filing
she can't have been filing
we can't have been filing
you can't have been filing
they can't have been filing	

Interrogative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
can I file?
can you file?
can she file?
can we file?
can you file?
can they file? 	can I be filing?
can you be filing?
can she be filing?
can we be filing?
can you be filing?
can they be filing? 	can I have filed?
can you have filed?
can she have filed?
can we have filed?
can you have filed?
can they have filed? 	can I have been filing?
can you have been filing?
can she have been filing?
can we have been filing?
can you have been filing?
can they have been filing? 	

Interro-negative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
can't I file?
can't you file?
can't she file?
can't we file?
can't you file?
can't they file? 	can't I be filing?
can't you be filing?
can't she be filing?
can't we be filing?
can't you be filing?
can't they be filing? 	can't I have filed?
can't you have filed?
can't she have filed?
can't we have filed?
can't you have filed?
can't they have filed? 	can't I have been filing?
can't you have been filing?
can't she have been filing?
can't we have been filing?
can't you have been filing?
can't they have been filing?