should tug
Verbo regular: tug - tugged- tugged

Afirmación 	
Forma simple 	Forma con V-ing 	Perfecto 	Perfecto con V-ing 	
I should tug
you should tug
she should tug
we should tug
you should tug
they should tug 	I should be tugging
you should be tugging
she should be tugging
we should be tugging
you should be tugging
they should be tugging	I should have tugged
you should have tugged
she 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
she should have been tugging
we should have been tugging
you should have been tugging
they should have been tugging	

Negación 	
Forma simple 	Forma con V-ing 	Perfecto 	Perfecto con V-ing 	
I should not tug
you should not tug
she 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
she 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
she 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
she should not have been tugging
we should not have been tugging
you should not have been tugging
they should not have been tugging	

Forma interrogativa 	
Forma simple 	Forma con V-ing 	Perfecto 	Perfecto con V-ing 	
should I tug?
should you tug?
should she tug?
should we tug?
should you tug?
should they tug? 	should I be tugging?
should you be tugging?
should she be tugging?
should we be tugging?
should you be tugging?
should they be tugging? 	should I have tugged?
should you have tugged?
should she 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 she have been tugging?
should we have been tugging?
should you have been tugging?
should they have been tugging? 	

Forma interro-negativa 	
Forma simple 	Forma con V-ing 	Perfecto 	Perfecto con V-ing 	
should I not tug?
should you not tug?
should she 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 she 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 she 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 she not have been tugging?
should we not have been tugging?
should you not have been tugging?
should they not have been tugging?