I can preregister you can preregister he can preregister we can preregister you can preregister they can preregister
V-ing form
I can be preregistering you can be preregistering he can be preregistering we can be preregistering you can be preregistering they can be preregistering
Perfect
I can have preregistered you can have preregistered he can have preregistered we can have preregistered you can have preregistered they can have preregistered
V-ing perfect
I can have been preregistering you can have been preregistering he can have been preregistering we can have been preregistering you can have been preregistering they can have been preregistering
Negation
Simple form
I cannot preregister you cannot preregister he cannot preregister we cannot preregister you cannot preregister they cannot preregister
V-ing form
I cannot be preregistering you cannot be preregistering he cannot be preregistering we cannot be preregistering you cannot be preregistering they cannot be preregistering
Perfect
I cannot have preregistered you cannot have preregistered he cannot have preregistered we cannot have preregistered you cannot have preregistered they cannot have preregistered
V-ing perfect
I cannot have been preregistering you cannot have been preregistering he cannot have been preregistering we cannot have been preregistering you cannot have been preregistering they cannot have been preregistering
Interrogative form
Simple form
can I preregister? can you preregister? can he preregister? can we preregister? can you preregister? can they preregister?
V-ing form
can I be preregistering? can you be preregistering? can he be preregistering? can we be preregistering? can you be preregistering? can they be preregistering?
Perfect
can I have preregistered? can you have preregistered? can he have preregistered? can we have preregistered? can you have preregistered? can they have preregistered?
V-ing perfect
can I have been preregistering? can you have been preregistering? can he have been preregistering? can we have been preregistering? can you have been preregistering? can they have been preregistering?
Interro-negative form
Simple form
can I not preregister? can you not preregister? can he not preregister? can we not preregister? can you not preregister? can they not preregister?
V-ing form
can I not be preregistering? can you not be preregistering? can he not be preregistering? can we not be preregistering? can you not be preregistering? can they not be preregistering?
Perfect
can I not have preregistered? can you not have preregistered? can he not have preregistered? can we not have preregistered? can you not have preregistered? can they not have preregistered?
V-ing perfect
can I not have been preregistering? can you not have been preregistering? can he not have been preregistering? can we not have been preregistering? can you not have been preregistering? can they not have been preregistering?