can fill
Regular verb: fill - filled- filled

Affirmation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I can fill
you can fill
he can fill
we can fill
you can fill
they can fill 	I can be filling
you can be filling
he can be filling
we can be filling
you can be filling
they can be filling	I can have filled
you can have filled
he can have filled
we can have filled
you can have filled
they can have filled	I can have been filling
you can have been filling
he can have been filling
we can have been filling
you can have been filling
they can have been filling	

Negation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I cannot fill
you cannot fill
he cannot fill
we cannot fill
you cannot fill
they cannot fill 	I cannot be filling
you cannot be filling
he cannot be filling
we cannot be filling
you cannot be filling
they cannot be filling	I cannot have filled
you cannot have filled
he cannot have filled
we cannot have filled
you cannot have filled
they cannot have filled	I cannot have been filling
you cannot have been filling
he cannot have been filling
we cannot have been filling
you cannot have been filling
they cannot have been filling	

Interrogative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
can I fill?
can you fill?
can he fill?
can we fill?
can you fill?
can they fill? 	can I be filling?
can you be filling?
can he be filling?
can we be filling?
can you be filling?
can they be filling? 	can I have filled?
can you have filled?
can he have filled?
can we have filled?
can you have filled?
can they have filled? 	can I have been filling?
can you have been filling?
can he have been filling?
can we have been filling?
can you have been filling?
can they have been filling? 	

Interro-negative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
can I not fill?
can you not fill?
can he not fill?
can we not fill?
can you not fill?
can they not fill? 	can I not be filling?
can you not be filling?
can he not be filling?
can we not be filling?
can you not be filling?
can they not be filling? 	can I not have filled?
can you not have filled?
can he not have filled?
can we not have filled?
can you not have filled?
can they not have filled? 	can I not have been filling?
can you not have been filling?
can he not have been filling?
can we not have been filling?
can you not have been filling?
can they not have been filling?