should fertilize
Regular verb: fertilize - fertilized- fertilized

Affirmation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I should fertilize
you should fertilize
he should fertilize
we should fertilize
you should fertilize
they should fertilize 	I should be fertilizing
you should be fertilizing
he should be fertilizing
we should be fertilizing
you should be fertilizing
they should be fertilizing	I should have fertilized
you should have fertilized
he should have fertilized
we should have fertilized
you should have fertilized
they should have fertilized	I should have been fertilizing
you should have been fertilizing
he should have been fertilizing
we should have been fertilizing
you should have been fertilizing
they should have been fertilizing	

Negation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I should not fertilize
you should not fertilize
he should not fertilize
we should not fertilize
you should not fertilize
they should not fertilize 	I should not be fertilizing
you should not be fertilizing
he should not be fertilizing
we should not be fertilizing
you should not be fertilizing
they should not be fertilizing	I should not have fertilized
you should not have fertilized
he should not have fertilized
we should not have fertilized
you should not have fertilized
they should not have fertilized	I should not have been fertilizing
you should not have been fertilizing
he should not have been fertilizing
we should not have been fertilizing
you should not have been fertilizing
they should not have been fertilizing	

Interrogative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
should I fertilize?
should you fertilize?
should he fertilize?
should we fertilize?
should you fertilize?
should they fertilize? 	should I be fertilizing?
should you be fertilizing?
should he be fertilizing?
should we be fertilizing?
should you be fertilizing?
should they be fertilizing? 	should I have fertilized?
should you have fertilized?
should he have fertilized?
should we have fertilized?
should you have fertilized?
should they have fertilized? 	should I have been fertilizing?
should you have been fertilizing?
should he have been fertilizing?
should we have been fertilizing?
should you have been fertilizing?
should they have been fertilizing? 	

Interro-negative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
should I not fertilize?
should you not fertilize?
should he not fertilize?
should we not fertilize?
should you not fertilize?
should they not fertilize? 	should I not be fertilizing?
should you not be fertilizing?
should he not be fertilizing?
should we not be fertilizing?
should you not be fertilizing?
should they not be fertilizing? 	should I not have fertilized?
should you not have fertilized?
should he not have fertilized?
should we not have fertilized?
should you not have fertilized?
should they not have fertilized? 	should I not have been fertilizing?
should you not have been fertilizing?
should he not have been fertilizing?
should we not have been fertilizing?
should you not have been fertilizing?
should they not have been fertilizing?