ought to fertilize
Regular verb: fertilize - fertilized- fertilized

Affirmation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I ought to fertilize
you ought to fertilize
she ought to fertilize
we ought to fertilize
you ought to fertilize
they ought to fertilize 	I ought to be fertilizing
you ought to be fertilizing
she ought to be fertilizing
we ought to be fertilizing
you ought to be fertilizing
they ought to be fertilizing	I ought to have fertilized
you ought to have fertilized
she ought to have fertilized
we ought to have fertilized
you ought to have fertilized
they ought to have fertilized	I ought to have been fertilizing
you ought to have been fertilizing
she ought to have been fertilizing
we ought to have been fertilizing
you ought to have been fertilizing
they ought to have been fertilizing	

Negation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I ought not to fertilize
you ought not to fertilize
she ought not to fertilize
we ought not to fertilize
you ought not to fertilize
they ought not to fertilize 	I ought not to fertilizing
you ought not to fertilizing
she ought not to fertilizing
we ought not to fertilizing
you ought not to fertilizing
they ought not to fertilizing	I ought not to have fertilized
you ought not to have fertilized
she ought not to have fertilized
we ought not to have fertilized
you ought not to have fertilized
they ought not to have fertilized	I ought not to have been fertilizing
you ought not to have been fertilizing
she ought not to have been fertilizing
we ought not to have been fertilizing
you ought not to have been fertilizing
they ought not to have been fertilizing	

Interrogative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
ought to I fertilize?
ought to you fertilize?
ought to she fertilize?
ought to we fertilize?
ought to you fertilize?
ought to they fertilize? 	ought to I be fertilizing?
ought to you be fertilizing?
ought to she be fertilizing?
ought to we be fertilizing?
ought to you be fertilizing?
ought to they be fertilizing? 	ought to I have fertilized?
ought to you have fertilized?
ought to she have fertilized?
ought to we have fertilized?
ought to you have fertilized?
ought to they have fertilized? 	ought to I have been fertilizing?
ought to you have been fertilizing?
ought to she have been fertilizing?
ought to we have been fertilizing?
ought to you have been fertilizing?
ought to they have been fertilizing? 	

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