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 cannot acknowledge you cannot acknowledge he cannot acknowledge we cannot acknowledge you cannot acknowledge they cannot acknowledge	I cannot be acknowledging you cannot be acknowledging he cannot be acknowledging we cannot be acknowledging you cannot be acknowledging they cannot be acknowledging
Perfect	V-ing perfect
I cannot have acknowledged you cannot have acknowledged he cannot have acknowledged we cannot have acknowledged you cannot have acknowledged they cannot have acknowledged	I cannot have been acknowledging you cannot have been acknowledging he cannot have been acknowledging we cannot have been acknowledging you cannot have been acknowledging they cannot 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 I not acknowledge? can you not acknowledge? can he not acknowledge? can we not acknowledge? can you not acknowledge? can they not acknowledge?	can I not be acknowledging? can you not be acknowledging? can he not be acknowledging? can we not be acknowledging? can you not be acknowledging? can they not be acknowledging?
Perfect	V-ing perfect
can I not have acknowledged? can you not have acknowledged? can he not have acknowledged? can we not have acknowledged? can you not have acknowledged? can they not have acknowledged?	can I not have been acknowledging? can you not have been acknowledging? can he not have been acknowledging? can we not have been acknowledging? can you not have been acknowledging? can they not have been acknowledging?