English verb conjugation
CAN PACK

Regular verb: pack - packed - packed

Affirmation

Simple form	V-ing form
I can pack you can pack she can pack we can pack you can pack they can pack	I can be packing you can be packing she 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 she 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 she 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 cannot pack you cannot pack she cannot pack we cannot pack you cannot pack they cannot pack	I cannot be packing you cannot be packing she cannot be packing we cannot be packing you cannot be packing they cannot be packing
Perfect	V-ing perfect
I cannot have packed you cannot have packed she cannot have packed we cannot have packed you cannot have packed they cannot have packed	I cannot have been packing you cannot have been packing she cannot have been packing we cannot have been packing you cannot have been packing they cannot have been packing

Interrogative form

Simple form	V-ing form
can I pack? can you pack? can she pack? can we pack? can you pack? can they pack?	can I be packing? can you be packing? can she 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 she 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 she 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 I not pack? can you not pack? can she not pack? can we not pack? can you not pack? can they not pack?	can I not be packing? can you not be packing? can she not be packing? can we not be packing? can you not be packing? can they not be packing?
Perfect	V-ing perfect
can I not have packed? can you not have packed? can she not have packed? can we not have packed? can you not have packed? can they not have packed?	can I not have been packing? can you not have been packing? can she not have been packing? can we not have been packing? can you not have been packing? can they not have been packing?