should stockpile
Regular verb: stockpile - stockpiled- stockpiled

Affirmation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I should stockpile
you should stockpile
he should stockpile
we should stockpile
you should stockpile
they should stockpile 	I should be stockpiling
you should be stockpiling
he should be stockpiling
we should be stockpiling
you should be stockpiling
they should be stockpiling	I should have stockpiled
you should have stockpiled
he should have stockpiled
we should have stockpiled
you should have stockpiled
they should have stockpiled	I should have been stockpiling
you should have been stockpiling
he should have been stockpiling
we should have been stockpiling
you should have been stockpiling
they should have been stockpiling	

Negation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I should not stockpile
you should not stockpile
he should not stockpile
we should not stockpile
you should not stockpile
they should not stockpile 	I should not be stockpiling
you should not be stockpiling
he should not be stockpiling
we should not be stockpiling
you should not be stockpiling
they should not be stockpiling	I should not have stockpiled
you should not have stockpiled
he should not have stockpiled
we should not have stockpiled
you should not have stockpiled
they should not have stockpiled	I should not have been stockpiling
you should not have been stockpiling
he should not have been stockpiling
we should not have been stockpiling
you should not have been stockpiling
they should not have been stockpiling	

Interrogative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
should I stockpile?
should you stockpile?
should he stockpile?
should we stockpile?
should you stockpile?
should they stockpile? 	should I be stockpiling?
should you be stockpiling?
should he be stockpiling?
should we be stockpiling?
should you be stockpiling?
should they be stockpiling? 	should I have stockpiled?
should you have stockpiled?
should he have stockpiled?
should we have stockpiled?
should you have stockpiled?
should they have stockpiled? 	should I have been stockpiling?
should you have been stockpiling?
should he have been stockpiling?
should we have been stockpiling?
should you have been stockpiling?
should they have been stockpiling? 	

Interro-negative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
should I not stockpile?
should you not stockpile?
should he not stockpile?
should we not stockpile?
should you not stockpile?
should they not stockpile? 	should I not be stockpiling?
should you not be stockpiling?
should he not be stockpiling?
should we not be stockpiling?
should you not be stockpiling?
should they not be stockpiling? 	should I not have stockpiled?
should you not have stockpiled?
should he not have stockpiled?
should we not have stockpiled?
should you not have stockpiled?
should they not have stockpiled? 	should I not have been stockpiling?
should you not have been stockpiling?
should he not have been stockpiling?
should we not have been stockpiling?
should you not have been stockpiling?
should they not have been stockpiling?