I can tag you can tag he can tag we can tag you can tag they can tag
V-ing form
I can be tagging you can be tagging he can be tagging we can be tagging you can be tagging they can be tagging
Perfect
I can have tagged you can have tagged he can have tagged we can have tagged you can have tagged they can have tagged
V-ing perfect
I can have been tagging you can have been tagging he can have been tagging we can have been tagging you can have been tagging they can have been tagging
Negation
Simple form
I can't tag you can't tag he can't tag we can't tag you can't tag they can't tag
V-ing form
I can't be tagging you can't be tagging he can't be tagging we can't be tagging you can't be tagging they can't be tagging
Perfect
I can't have tagged you can't have tagged he can't have tagged we can't have tagged you can't have tagged they can't have tagged
V-ing perfect
I can't have been tagging you can't have been tagging he can't have been tagging we can't have been tagging you can't have been tagging they can't have been tagging
Interrogative form
Simple form
can I tag? can you tag? can he tag? can we tag? can you tag? can they tag?
V-ing form
can I be tagging? can you be tagging? can he be tagging? can we be tagging? can you be tagging? can they be tagging?
Perfect
can I have tagged? can you have tagged? can he have tagged? can we have tagged? can you have tagged? can they have tagged?
V-ing perfect
can I have been tagging? can you have been tagging? can he have been tagging? can we have been tagging? can you have been tagging? can they have been tagging?
Interro-negative form
Simple form
can't I tag? can't you tag? can't he tag? can't we tag? can't you tag? can't they tag?
V-ing form
can't I be tagging? can't you be tagging? can't he be tagging? can't we be tagging? can't you be tagging? can't they be tagging?
Perfect
can't I have tagged? can't you have tagged? can't he have tagged? can't we have tagged? can't you have tagged? can't they have tagged?
V-ing perfect
can't I have been tagging? can't you have been tagging? can't he have been tagging? can't we have been tagging? can't you have been tagging? can't they have been tagging?