could pack
Regular verb: pack - packed- packed

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

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