can pack
Regular verb: pack - packed- packed

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