English verb conjugation
CAN ACKNOWLEDGE

Regular verb: acknowledge - acknowledged - acknowledged

Affirmation

Simple form	V-ing form
I can acknowledge you can acknowledge he can acknowledge we can acknowledge you can acknowledge they can acknowledge	I can be acknowledging you can be acknowledging he can be acknowledging we can be acknowledging you can be acknowledging they can be acknowledging
Perfect	V-ing perfect
I can have acknowledged you can have acknowledged he can have acknowledged we can have acknowledged you can have acknowledged they can have acknowledged	I can have been acknowledging you can have been acknowledging he can have been acknowledging we can have been acknowledging you can have been acknowledging they can have been acknowledging

Negation

Simple form	V-ing form
I can't acknowledge you can't acknowledge he can't acknowledge we can't acknowledge you can't acknowledge they can't acknowledge	I can't be acknowledging you can't be acknowledging he can't be acknowledging we can't be acknowledging you can't be acknowledging they can't be acknowledging
Perfect	V-ing perfect
I can't have acknowledged you can't have acknowledged he can't have acknowledged we can't have acknowledged you can't have acknowledged they can't have acknowledged	I can't have been acknowledging you can't have been acknowledging he can't have been acknowledging we can't have been acknowledging you can't have been acknowledging they can't have been acknowledging

Interrogative form

Simple form	V-ing form
can I acknowledge? can you acknowledge? can he acknowledge? can we acknowledge? can you acknowledge? can they acknowledge?	can I be acknowledging? can you be acknowledging? can he be acknowledging? can we be acknowledging? can you be acknowledging? can they be acknowledging?
Perfect	V-ing perfect
can I have acknowledged? can you have acknowledged? can he have acknowledged? can we have acknowledged? can you have acknowledged? can they have acknowledged?	can I have been acknowledging? can you have been acknowledging? can he have been acknowledging? can we have been acknowledging? can you have been acknowledging? can they have been acknowledging?

Interro-negative form

Simple form	V-ing form
can't I acknowledge? can't you acknowledge? can't he acknowledge? can't we acknowledge? can't you acknowledge? can't they acknowledge?	can't I be acknowledging? can't you be acknowledging? can't he be acknowledging? can't we be acknowledging? can't you be acknowledging? can't they be acknowledging?
Perfect	V-ing perfect
can't I have acknowledged? can't you have acknowledged? can't he have acknowledged? can't we have acknowledged? can't you have acknowledged? can't they have acknowledged?	can't I have been acknowledging? can't you have been acknowledging? can't he have been acknowledging? can't we have been acknowledging? can't you have been acknowledging? can't they have been acknowledging?