ought to corrode
Regular verb: corrode - corroded- corroded

Affirmation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I ought to corrode
you ought to corrode
he ought to corrode
we ought to corrode
you ought to corrode
they ought to corrode 	I ought to be corroding
you ought to be corroding
he ought to be corroding
we ought to be corroding
you ought to be corroding
they ought to be corroding	I ought to have corroded
you ought to have corroded
he ought to have corroded
we ought to have corroded
you ought to have corroded
they ought to have corroded	I ought to have been corroding
you ought to have been corroding
he ought to have been corroding
we ought to have been corroding
you ought to have been corroding
they ought to have been corroding	

Negation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I oughtn't to corrode
you oughtn't to corrode
he oughtn't to corrode
we oughtn't to corrode
you oughtn't to corrode
they oughtn't to corrode 	I oughtn't to be corroding
you oughtn't to be corroding
he oughtn't to be corroding
we oughtn't to be corroding
you oughtn't to be corroding
they oughtn't to be corroding	I oughtn't to have corroded
you oughtn't to have corroded
he oughtn't to have corroded
we oughtn't to have corroded
you oughtn't to have corroded
they oughtn't to have corroded	I oughtn't to have been corroding
you oughtn't to have been corroding
he oughtn't to have been corroding
we oughtn't to have been corroding
you oughtn't to have been corroding
they oughtn't to have been corroding	

Interrogative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
ought to I corrode?
ought to you corrode?
ought to he corrode?
ought to we corrode?
ought to you corrode?
ought to they corrode? 	ought to I be corroding?
ought to you be corroding?
ought to he be corroding?
ought to we be corroding?
ought to you be corroding?
ought to they be corroding? 	ought to I have corroded?
ought to you have corroded?
ought to he have corroded?
ought to we have corroded?
ought to you have corroded?
ought to they have corroded? 	ought to I have been corroding?
ought to you have been corroding?
ought to he have been corroding?
ought to we have been corroding?
ought to you have been corroding?
ought to they have been corroding? 	

Interro-negative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
oughtn't I to corrode?
oughtn't you to corrode?
oughtn't he to corrode?
oughtn't we to corrode?
oughtn't you to corrode?
oughtn't they to corrode? 	oughtn't I to be corroding?
oughtn't you to be corroding?
oughtn't he to be corroding?
oughtn't we to be corroding?
oughtn't you to be corroding?
oughtn't they to be corroding? 	oughtn't I to have corroded?
oughtn't you to have corroded?
oughtn't he to have corroded?
oughtn't we to have corroded?
oughtn't you to have corroded?
oughtn't they to have corroded? 	oughtn't I to have been corroding?
oughtn't you to have been corroding?
oughtn't he to have been corroding?
oughtn't we to have been corroding?
oughtn't you to have been corroding?
oughtn't they to have been corroding?