I can tag you can tag she can tag we can tag you can tag they can tag
V-ing form
I can be tagging you can be tagging she can be tagging we can be tagging you can be tagging they can be tagging
Perfect
I can have tagged you can have tagged she 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 she can have been tagging we can have been tagging you can have been tagging they can have been tagging
Negation
Simple form
I cannot tag you cannot tag she cannot tag we cannot tag you cannot tag they cannot tag
V-ing form
I cannot be tagging you cannot be tagging she cannot be tagging we cannot be tagging you cannot be tagging they cannot be tagging
Perfect
I cannot have tagged you cannot have tagged she cannot have tagged we cannot have tagged you cannot have tagged they cannot have tagged
V-ing perfect
I cannot have been tagging you cannot have been tagging she cannot have been tagging we cannot have been tagging you cannot have been tagging they cannot have been tagging
Interrogative form
Simple form
can I tag? can you tag? can she tag? can we tag? can you tag? can they tag?
V-ing form
can I be tagging? can you be tagging? can she be tagging? can we be tagging? can you be tagging? can they be tagging?
Perfect
can I have tagged? can you have tagged? can she 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 she have been tagging? can we have been tagging? can you have been tagging? can they have been tagging?
Interro-negative form
Simple form
can I not tag? can you not tag? can she not tag? can we not tag? can you not tag? can they not tag?
V-ing form
can I not be tagging? can you not be tagging? can she not be tagging? can we not be tagging? can you not be tagging? can they not be tagging?
Perfect
can I not have tagged? can you not have tagged? can she not have tagged? can we not have tagged? can you not have tagged? can they not have tagged?
V-ing perfect
can I not have been tagging? can you not have been tagging? can she not have been tagging? can we not have been tagging? can you not have been tagging? can they not have been tagging?