should extract
Regular verb: extract - extracted- extracted

Affirmation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I should extract
you should extract
he should extract
we should extract
you should extract
they should extract 	I should be extracting
you should be extracting
he should be extracting
we should be extracting
you should be extracting
they should be extracting	I should have extracted
you should have extracted
he should have extracted
we should have extracted
you should have extracted
they should have extracted	I should have been extracting
you should have been extracting
he should have been extracting
we should have been extracting
you should have been extracting
they should have been extracting	

Negation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I should not extract
you should not extract
he should not extract
we should not extract
you should not extract
they should not extract 	I should not be extracting
you should not be extracting
he should not be extracting
we should not be extracting
you should not be extracting
they should not be extracting	I should not have extracted
you should not have extracted
he should not have extracted
we should not have extracted
you should not have extracted
they should not have extracted	I should not have been extracting
you should not have been extracting
he should not have been extracting
we should not have been extracting
you should not have been extracting
they should not have been extracting	

Interrogative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
should I extract?
should you extract?
should he extract?
should we extract?
should you extract?
should they extract? 	should I be extracting?
should you be extracting?
should he be extracting?
should we be extracting?
should you be extracting?
should they be extracting? 	should I have extracted?
should you have extracted?
should he have extracted?
should we have extracted?
should you have extracted?
should they have extracted? 	should I have been extracting?
should you have been extracting?
should he have been extracting?
should we have been extracting?
should you have been extracting?
should they have been extracting? 	

Interro-negative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
should I not extract?
should you not extract?
should he not extract?
should we not extract?
should you not extract?
should they not extract? 	should I not be extracting?
should you not be extracting?
should he not be extracting?
should we not be extracting?
should you not be extracting?
should they not be extracting? 	should I not have extracted?
should you not have extracted?
should he not have extracted?
should we not have extracted?
should you not have extracted?
should they not have extracted? 	should I not have been extracting?
should you not have been extracting?
should he not have been extracting?
should we not have been extracting?
should you not have been extracting?
should they not have been extracting?