can untack
Regular verb: untack - untacked- untacked

Affirmation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I can untack
you can untack
she can untack
we can untack
you can untack
they can untack 	I can be untacking
you can be untacking
she can be untacking
we can be untacking
you can be untacking
they can be untacking	I can have untacked
you can have untacked
she can have untacked
we can have untacked
you can have untacked
they can have untacked	I can have been untacking
you can have been untacking
she can have been untacking
we can have been untacking
you can have been untacking
they can have been untacking	

Negation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I can't untack
you can't untack
she can't untack
we can't untack
you can't untack
they can't untack 	I can't be untacking
you can't be untacking
she can't be untacking
we can't be untacking
you can't be untacking
they can't be untacking	I can't have untacked
you can't have untacked
she can't have untacked
we can't have untacked
you can't have untacked
they can't have untacked	I can't have been untacking
you can't have been untacking
she can't have been untacking
we can't have been untacking
you can't have been untacking
they can't have been untacking	

Interrogative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
can I untack?
can you untack?
can she untack?
can we untack?
can you untack?
can they untack? 	can I be untacking?
can you be untacking?
can she be untacking?
can we be untacking?
can you be untacking?
can they be untacking? 	can I have untacked?
can you have untacked?
can she have untacked?
can we have untacked?
can you have untacked?
can they have untacked? 	can I have been untacking?
can you have been untacking?
can she have been untacking?
can we have been untacking?
can you have been untacking?
can they have been untacking? 	

Interro-negative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
can't I untack?
can't you untack?
can't she untack?
can't we untack?
can't you untack?
can't they untack? 	can't I be untacking?
can't you be untacking?
can't she be untacking?
can't we be untacking?
can't you be untacking?
can't they be untacking? 	can't I have untacked?
can't you have untacked?
can't she have untacked?
can't we have untacked?
can't you have untacked?
can't they have untacked? 	can't I have been untacking?
can't you have been untacking?
can't she have been untacking?
can't we have been untacking?
can't you have been untacking?
can't they have been untacking?