should decay
Regular verb: decay - decayed- decayed

Affirmation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I should decay
you should decay
he should decay
we should decay
you should decay
they should decay 	I should be decaying
you should be decaying
he should be decaying
we should be decaying
you should be decaying
they should be decaying	I should have decayed
you should have decayed
he should have decayed
we should have decayed
you should have decayed
they should have decayed	I should have been decaying
you should have been decaying
he should have been decaying
we should have been decaying
you should have been decaying
they should have been decaying	

Negation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I should not decay
you should not decay
he should not decay
we should not decay
you should not decay
they should not decay 	I should not be decaying
you should not be decaying
he should not be decaying
we should not be decaying
you should not be decaying
they should not be decaying	I should not have decayed
you should not have decayed
he should not have decayed
we should not have decayed
you should not have decayed
they should not have decayed	I should not have been decaying
you should not have been decaying
he should not have been decaying
we should not have been decaying
you should not have been decaying
they should not have been decaying	

Interrogative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
should I decay?
should you decay?
should he decay?
should we decay?
should you decay?
should they decay? 	should I be decaying?
should you be decaying?
should he be decaying?
should we be decaying?
should you be decaying?
should they be decaying? 	should I have decayed?
should you have decayed?
should he have decayed?
should we have decayed?
should you have decayed?
should they have decayed? 	should I have been decaying?
should you have been decaying?
should he have been decaying?
should we have been decaying?
should you have been decaying?
should they have been decaying? 	

Interro-negative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
should I not decay?
should you not decay?
should he not decay?
should we not decay?
should you not decay?
should they not decay? 	should I not be decaying?
should you not be decaying?
should he not be decaying?
should we not be decaying?
should you not be decaying?
should they not be decaying? 	should I not have decayed?
should you not have decayed?
should he not have decayed?
should we not have decayed?
should you not have decayed?
should they not have decayed? 	should I not have been decaying?
should you not have been decaying?
should he not have been decaying?
should we not have been decaying?
should you not have been decaying?
should they not have been decaying?