can pack
Regular verb: pack - packed- packed

Affirmation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
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	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 	Perfect 	V-ing perfect 	
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	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 	Perfect 	V-ing perfect 	
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? 	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 	Perfect 	V-ing perfect 	
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? 	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?