English verb conjugation
CAN SACK

Regular verb: sack - sacked - sacked

Affirmation

Simple form	V-ing form
I can sack you can sack he can sack we can sack you can sack they can sack	I can be sacking you can be sacking he can be sacking we can be sacking you can be sacking they can be sacking
Perfect	V-ing perfect
I can have sacked you can have sacked he can have sacked we can have sacked you can have sacked they can have sacked	I can have been sacking you can have been sacking he can have been sacking we can have been sacking you can have been sacking they can have been sacking

Negation

Simple form	V-ing form
I cannot sack you cannot sack he cannot sack we cannot sack you cannot sack they cannot sack	I cannot be sacking you cannot be sacking he cannot be sacking we cannot be sacking you cannot be sacking they cannot be sacking
Perfect	V-ing perfect
I cannot have sacked you cannot have sacked he cannot have sacked we cannot have sacked you cannot have sacked they cannot have sacked	I cannot have been sacking you cannot have been sacking he cannot have been sacking we cannot have been sacking you cannot have been sacking they cannot have been sacking

Interrogative form

Simple form	V-ing form
can I sack? can you sack? can he sack? can we sack? can you sack? can they sack?	can I be sacking? can you be sacking? can he be sacking? can we be sacking? can you be sacking? can they be sacking?
Perfect	V-ing perfect
can I have sacked? can you have sacked? can he have sacked? can we have sacked? can you have sacked? can they have sacked?	can I have been sacking? can you have been sacking? can he have been sacking? can we have been sacking? can you have been sacking? can they have been sacking?

Interro-negative form

Simple form	V-ing form
can I not sack? can you not sack? can he not sack? can we not sack? can you not sack? can they not sack?	can I not be sacking? can you not be sacking? can he not be sacking? can we not be sacking? can you not be sacking? can they not be sacking?
Perfect	V-ing perfect
can I not have sacked? can you not have sacked? can he not have sacked? can we not have sacked? can you not have sacked? can they not have sacked?	can I not have been sacking? can you not have been sacking? can he not have been sacking? can we not have been sacking? can you not have been sacking? can they not have been sacking?