should percolate
Regular verb: percolate - percolated- percolated

Affirmation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I should percolate
you should percolate
he should percolate
we should percolate
you should percolate
they should percolate 	I should be percolating
you should be percolating
he should be percolating
we should be percolating
you should be percolating
they should be percolating	I should have percolated
you should have percolated
he should have percolated
we should have percolated
you should have percolated
they should have percolated	I should have been percolating
you should have been percolating
he should have been percolating
we should have been percolating
you should have been percolating
they should have been percolating	

Negation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I should not percolate
you should not percolate
he should not percolate
we should not percolate
you should not percolate
they should not percolate 	I should not be percolating
you should not be percolating
he should not be percolating
we should not be percolating
you should not be percolating
they should not be percolating	I should not have percolated
you should not have percolated
he should not have percolated
we should not have percolated
you should not have percolated
they should not have percolated	I should not have been percolating
you should not have been percolating
he should not have been percolating
we should not have been percolating
you should not have been percolating
they should not have been percolating	

Interrogative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
should I percolate?
should you percolate?
should he percolate?
should we percolate?
should you percolate?
should they percolate? 	should I be percolating?
should you be percolating?
should he be percolating?
should we be percolating?
should you be percolating?
should they be percolating? 	should I have percolated?
should you have percolated?
should he have percolated?
should we have percolated?
should you have percolated?
should they have percolated? 	should I have been percolating?
should you have been percolating?
should he have been percolating?
should we have been percolating?
should you have been percolating?
should they have been percolating? 	

Interro-negative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
should I not percolate?
should you not percolate?
should he not percolate?
should we not percolate?
should you not percolate?
should they not percolate? 	should I not be percolating?
should you not be percolating?
should he not be percolating?
should we not be percolating?
should you not be percolating?
should they not be percolating? 	should I not have percolated?
should you not have percolated?
should he not have percolated?
should we not have percolated?
should you not have percolated?
should they not have percolated? 	should I not have been percolating?
should you not have been percolating?
should he not have been percolating?
should we not have been percolating?
should you not have been percolating?
should they not have been percolating?