English verb conjugation
CAN TAG

Regular verb: tag - tagged - tagged

Affirmation

Simple form	V-ing form
I can tag you can tag he can tag we can tag you can tag they can tag	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	V-ing 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	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	V-ing form
I cannot tag you cannot tag he cannot tag we cannot tag you cannot tag they cannot tag	I cannot be tagging you cannot be tagging he cannot be tagging we cannot be tagging you cannot be tagging they cannot be tagging
Perfect	V-ing perfect
I cannot have tagged you cannot have tagged he cannot have tagged we cannot have tagged you cannot have tagged they cannot have tagged	I cannot have been tagging you cannot have been tagging he cannot have been tagging we cannot have been tagging you cannot have been tagging they cannot have been tagging

Interrogative form

Simple form	V-ing form
can I tag? can you tag? can he tag? can we tag? can you tag? can they tag?	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	V-ing 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?	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	V-ing form
can I not tag? can you not tag? can he not tag? can we not tag? can you not tag? can they not tag?	can I not be tagging? can you not be tagging? can he not be tagging? can we not be tagging? can you not be tagging? can they not be tagging?
Perfect	V-ing perfect
can I not have tagged? can you not have tagged? can he not have tagged? can we not have tagged? can you not have tagged? can they not have tagged?	can I not have been tagging? can you not have been tagging? can he not have been tagging? can we not have been tagging? can you not have been tagging? can they not have been tagging?