should tack
Regular verb: tack - tacked- tacked

Affirmation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I should tack
you should tack
she should tack
we should tack
you should tack
they should tack 	I should be tacking
you should be tacking
she should be tacking
we should be tacking
you should be tacking
they should be tacking	I should have tacked
you should have tacked
she should have tacked
we should have tacked
you should have tacked
they should have tacked	I should have been tacking
you should have been tacking
she should have been tacking
we should have been tacking
you should have been tacking
they should have been tacking	

Negation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I should not tack
you should not tack
she should not tack
we should not tack
you should not tack
they should not tack 	I should not be tacking
you should not be tacking
she should not be tacking
we should not be tacking
you should not be tacking
they should not be tacking	I should not have tacked
you should not have tacked
she should not have tacked
we should not have tacked
you should not have tacked
they should not have tacked	I should not have been tacking
you should not have been tacking
she should not have been tacking
we should not have been tacking
you should not have been tacking
they should not have been tacking	

Interrogative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
should I tack?
should you tack?
should she tack?
should we tack?
should you tack?
should they tack? 	should I be tacking?
should you be tacking?
should she be tacking?
should we be tacking?
should you be tacking?
should they be tacking? 	should I have tacked?
should you have tacked?
should she have tacked?
should we have tacked?
should you have tacked?
should they have tacked? 	should I have been tacking?
should you have been tacking?
should she have been tacking?
should we have been tacking?
should you have been tacking?
should they have been tacking? 	

Interro-negative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
should I not tack?
should you not tack?
should she not tack?
should we not tack?
should you not tack?
should they not tack? 	should I not be tacking?
should you not be tacking?
should she not be tacking?
should we not be tacking?
should you not be tacking?
should they not be tacking? 	should I not have tacked?
should you not have tacked?
should she not have tacked?
should we not have tacked?
should you not have tacked?
should they not have tacked? 	should I not have been tacking?
should you not have been tacking?
should she not have been tacking?
should we not have been tacking?
should you not have been tacking?
should they not have been tacking?