English verb conjugation
CAN FILL

Regular verb: fill - filled - filled

Affirmation

Simple form	V-ing form
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
Perfect	V-ing perfect
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
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
Perfect	V-ing perfect
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
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?
Perfect	V-ing perfect
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
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?
Perfect	V-ing perfect
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?