can tag
Regular verb: tag - tagged- tagged

Affirmation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
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	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 	Perfect 	V-ing perfect 	
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	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 	Perfect 	V-ing perfect 	
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? 	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 	Perfect 	V-ing perfect 	
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? 	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?