should double
Regular verb: double - doubled- doubled

Affirmation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I should double
you should double
he should double
we should double
you should double
they should double 	I should be doubling
you should be doubling
he should be doubling
we should be doubling
you should be doubling
they should be doubling	I should have doubled
you should have doubled
he should have doubled
we should have doubled
you should have doubled
they should have doubled	I should have been doubling
you should have been doubling
he should have been doubling
we should have been doubling
you should have been doubling
they should have been doubling	

Negation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I should not double
you should not double
he should not double
we should not double
you should not double
they should not double 	I should not be doubling
you should not be doubling
he should not be doubling
we should not be doubling
you should not be doubling
they should not be doubling	I should not have doubled
you should not have doubled
he should not have doubled
we should not have doubled
you should not have doubled
they should not have doubled	I should not have been doubling
you should not have been doubling
he should not have been doubling
we should not have been doubling
you should not have been doubling
they should not have been doubling	

Interrogative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
should I double?
should you double?
should he double?
should we double?
should you double?
should they double? 	should I be doubling?
should you be doubling?
should he be doubling?
should we be doubling?
should you be doubling?
should they be doubling? 	should I have doubled?
should you have doubled?
should he have doubled?
should we have doubled?
should you have doubled?
should they have doubled? 	should I have been doubling?
should you have been doubling?
should he have been doubling?
should we have been doubling?
should you have been doubling?
should they have been doubling? 	

Interro-negative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
should I not double?
should you not double?
should he not double?
should we not double?
should you not double?
should they not double? 	should I not be doubling?
should you not be doubling?
should he not be doubling?
should we not be doubling?
should you not be doubling?
should they not be doubling? 	should I not have doubled?
should you not have doubled?
should he not have doubled?
should we not have doubled?
should you not have doubled?
should they not have doubled? 	should I not have been doubling?
should you not have been doubling?
should he not have been doubling?
should we not have been doubling?
should you not have been doubling?
should they not have been doubling?