ought to sterilize
Regular verb: sterilize - sterilized- sterilized

Affirmation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I ought to sterilize
you ought to sterilize
she ought to sterilize
we ought to sterilize
you ought to sterilize
they ought to sterilize 	I ought to be sterilizing
you ought to be sterilizing
she ought to be sterilizing
we ought to be sterilizing
you ought to be sterilizing
they ought to be sterilizing	I ought to have sterilized
you ought to have sterilized
she ought to have sterilized
we ought to have sterilized
you ought to have sterilized
they ought to have sterilized	I ought to have been sterilizing
you ought to have been sterilizing
she ought to have been sterilizing
we ought to have been sterilizing
you ought to have been sterilizing
they ought to have been sterilizing	

Negation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I oughtn't to sterilize
you oughtn't to sterilize
she oughtn't to sterilize
we oughtn't to sterilize
you oughtn't to sterilize
they oughtn't to sterilize 	I oughtn't to be sterilizing
you oughtn't to be sterilizing
she oughtn't to be sterilizing
we oughtn't to be sterilizing
you oughtn't to be sterilizing
they oughtn't to be sterilizing	I oughtn't to have sterilized
you oughtn't to have sterilized
she oughtn't to have sterilized
we oughtn't to have sterilized
you oughtn't to have sterilized
they oughtn't to have sterilized	I oughtn't to have been sterilizing
you oughtn't to have been sterilizing
she oughtn't to have been sterilizing
we oughtn't to have been sterilizing
you oughtn't to have been sterilizing
they oughtn't to have been sterilizing	

Interrogative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
ought to I sterilize?
ought to you sterilize?
ought to she sterilize?
ought to we sterilize?
ought to you sterilize?
ought to they sterilize? 	ought to I be sterilizing?
ought to you be sterilizing?
ought to she be sterilizing?
ought to we be sterilizing?
ought to you be sterilizing?
ought to they be sterilizing? 	ought to I have sterilized?
ought to you have sterilized?
ought to she have sterilized?
ought to we have sterilized?
ought to you have sterilized?
ought to they have sterilized? 	ought to I have been sterilizing?
ought to you have been sterilizing?
ought to she have been sterilizing?
ought to we have been sterilizing?
ought to you have been sterilizing?
ought to they have been sterilizing? 	

Interro-negative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
oughtn't I to sterilize?
oughtn't you to sterilize?
oughtn't she to sterilize?
oughtn't we to sterilize?
oughtn't you to sterilize?
oughtn't they to sterilize? 	oughtn't I to be sterilizing?
oughtn't you to be sterilizing?
oughtn't she to be sterilizing?
oughtn't we to be sterilizing?
oughtn't you to be sterilizing?
oughtn't they to be sterilizing? 	oughtn't I to have sterilized?
oughtn't you to have sterilized?
oughtn't she to have sterilized?
oughtn't we to have sterilized?
oughtn't you to have sterilized?
oughtn't they to have sterilized? 	oughtn't I to have been sterilizing?
oughtn't you to have been sterilizing?
oughtn't she to have been sterilizing?
oughtn't we to have been sterilizing?
oughtn't you to have been sterilizing?
oughtn't they to have been sterilizing?