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 can't sack you can't sack he can't sack we can't sack you can't sack they can't sack	I can't be sacking you can't be sacking he can't be sacking we can't be sacking you can't be sacking they can't be sacking
Perfect	V-ing perfect
I can't have sacked you can't have sacked he can't have sacked we can't have sacked you can't have sacked they can't have sacked	I can't have been sacking you can't have been sacking he can't have been sacking we can't have been sacking you can't have been sacking they can't 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't I sack? can't you sack? can't he sack? can't we sack? can't you sack? can't they sack?	can't I be sacking? can't you be sacking? can't he be sacking? can't we be sacking? can't you be sacking? can't they be sacking?
Perfect	V-ing perfect
can't I have sacked? can't you have sacked? can't he have sacked? can't we have sacked? can't you have sacked? can't they have sacked?	can't I have been sacking? can't you have been sacking? can't he have been sacking? can't we have been sacking? can't you have been sacking? can't they have been sacking?