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 can't fill you can't fill he can't fill we can't fill you can't fill they can't fill	I can't be filling you can't be filling he can't be filling we can't be filling you can't be filling they can't be filling
Perfect	V-ing perfect
I can't have filled you can't have filled he can't have filled we can't have filled you can't have filled they can't have filled	I can't have been filling you can't have been filling he can't have been filling we can't have been filling you can't have been filling they can't 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't I fill? can't you fill? can't he fill? can't we fill? can't you fill? can't they fill?	can't I be filling? can't you be filling? can't he be filling? can't we be filling? can't you be filling? can't they be filling?
Perfect	V-ing perfect
can't I have filled? can't you have filled? can't he have filled? can't we have filled? can't you have filled? can't they have filled?	can't I have been filling? can't you have been filling? can't he have been filling? can't we have been filling? can't you have been filling? can't they have been filling?