I can packet you can packet he can packet we can packet you can packet they can packet
V-ing form
I can be packeting you can be packeting he can be packeting we can be packeting you can be packeting they can be packeting
Perfect
I can have packeted you can have packeted he can have packeted we can have packeted you can have packeted they can have packeted
V-ing perfect
I can have been packeting you can have been packeting he can have been packeting we can have been packeting you can have been packeting they can have been packeting
Negation
Simple form
I cannot packet you cannot packet he cannot packet we cannot packet you cannot packet they cannot packet
V-ing form
I cannot be packeting you cannot be packeting he cannot be packeting we cannot be packeting you cannot be packeting they cannot be packeting
Perfect
I cannot have packeted you cannot have packeted he cannot have packeted we cannot have packeted you cannot have packeted they cannot have packeted
V-ing perfect
I cannot have been packeting you cannot have been packeting he cannot have been packeting we cannot have been packeting you cannot have been packeting they cannot have been packeting
Interrogative form
Simple form
can I packet? can you packet? can he packet? can we packet? can you packet? can they packet?
V-ing form
can I be packeting? can you be packeting? can he be packeting? can we be packeting? can you be packeting? can they be packeting?
Perfect
can I have packeted? can you have packeted? can he have packeted? can we have packeted? can you have packeted? can they have packeted?
V-ing perfect
can I have been packeting? can you have been packeting? can he have been packeting? can we have been packeting? can you have been packeting? can they have been packeting?
Interro-negative form
Simple form
can I not packet? can you not packet? can he not packet? can we not packet? can you not packet? can they not packet?
V-ing form
can I not be packeting? can you not be packeting? can he not be packeting? can we not be packeting? can you not be packeting? can they not be packeting?
Perfect
can I not have packeted? can you not have packeted? can he not have packeted? can we not have packeted? can you not have packeted? can they not have packeted?
V-ing perfect
can I not have been packeting? can you not have been packeting? can he not have been packeting? can we not have been packeting? can you not have been packeting? can they not have been packeting?