English verb conjugation
CAN FILL

Regular verb: fill - filled - filled

Affirmation

Simple form	V-ing form
I can fill you can fill she can fill we can fill you can fill they can fill	I can be filling you can be filling she 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 she 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 she 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 she 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 she 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 she 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 she 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 she fill? can we fill? can you fill? can they fill?	can I be filling? can you be filling? can she 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 she 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 she 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 she 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 she 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 she 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 she have been filling? can't we have been filling? can't you have been filling? can't they have been filling?