should tug
Regular verb: tug - tugged- tugged

Affirmation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I should tug
you should tug
he should tug
we should tug
you should tug
they should tug 	I should be tugging
you should be tugging
he should be tugging
we should be tugging
you should be tugging
they should be tugging	I should have tugged
you should have tugged
he should have tugged
we should have tugged
you should have tugged
they should have tugged	I should have been tugging
you should have been tugging
he should have been tugging
we should have been tugging
you should have been tugging
they should have been tugging	

Negation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I should not tug
you should not tug
he should not tug
we should not tug
you should not tug
they should not tug 	I should not be tugging
you should not be tugging
he should not be tugging
we should not be tugging
you should not be tugging
they should not be tugging	I should not have tugged
you should not have tugged
he should not have tugged
we should not have tugged
you should not have tugged
they should not have tugged	I should not have been tugging
you should not have been tugging
he should not have been tugging
we should not have been tugging
you should not have been tugging
they should not have been tugging	

Interrogative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
should I tug?
should you tug?
should he tug?
should we tug?
should you tug?
should they tug? 	should I be tugging?
should you be tugging?
should he be tugging?
should we be tugging?
should you be tugging?
should they be tugging? 	should I have tugged?
should you have tugged?
should he have tugged?
should we have tugged?
should you have tugged?
should they have tugged? 	should I have been tugging?
should you have been tugging?
should he have been tugging?
should we have been tugging?
should you have been tugging?
should they have been tugging? 	

Interro-negative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
should I not tug?
should you not tug?
should he not tug?
should we not tug?
should you not tug?
should they not tug? 	should I not be tugging?
should you not be tugging?
should he not be tugging?
should we not be tugging?
should you not be tugging?
should they not be tugging? 	should I not have tugged?
should you not have tugged?
should he not have tugged?
should we not have tugged?
should you not have tugged?
should they not have tugged? 	should I not have been tugging?
should you not have been tugging?
should he not have been tugging?
should we not have been tugging?
should you not have been tugging?
should they not have been tugging?