English verb conjugation
CAN PACK

Regular verb: pack - packed - packed

Affirmation

Simple form	V-ing form
I can pack you can pack he can pack we can pack you can pack they can pack	I can be packing you can be packing he can be packing we can be packing you can be packing they can be packing
Perfect	V-ing perfect
I can have packed you can have packed he can have packed we can have packed you can have packed they can have packed	I can have been packing you can have been packing he can have been packing we can have been packing you can have been packing they can have been packing

Negation

Simple form	V-ing form
I can't pack you can't pack he can't pack we can't pack you can't pack they can't pack	I can't be packing you can't be packing he can't be packing we can't be packing you can't be packing they can't be packing
Perfect	V-ing perfect
I can't have packed you can't have packed he can't have packed we can't have packed you can't have packed they can't have packed	I can't have been packing you can't have been packing he can't have been packing we can't have been packing you can't have been packing they can't have been packing

Interrogative form

Simple form	V-ing form
can I pack? can you pack? can he pack? can we pack? can you pack? can they pack?	can I be packing? can you be packing? can he be packing? can we be packing? can you be packing? can they be packing?
Perfect	V-ing perfect
can I have packed? can you have packed? can he have packed? can we have packed? can you have packed? can they have packed?	can I have been packing? can you have been packing? can he have been packing? can we have been packing? can you have been packing? can they have been packing?

Interro-negative form

Simple form	V-ing form
can't I pack? can't you pack? can't he pack? can't we pack? can't you pack? can't they pack?	can't I be packing? can't you be packing? can't he be packing? can't we be packing? can't you be packing? can't they be packing?
Perfect	V-ing perfect
can't I have packed? can't you have packed? can't he have packed? can't we have packed? can't you have packed? can't they have packed?	can't I have been packing? can't you have been packing? can't he have been packing? can't we have been packing? can't you have been packing? can't they have been packing?