English verb conjugation
COULD PACK

Regular verb: pack - packed - packed

Affirmation

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

Negation

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

Interrogative form

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

Interro-negative form

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