ought to weaken
Regular verb: weaken - weakened- weakened

Affirmation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I ought to weaken
you ought to weaken
she ought to weaken
we ought to weaken
you ought to weaken
they ought to weaken 	I ought to be weakening
you ought to be weakening
she ought to be weakening
we ought to be weakening
you ought to be weakening
they ought to be weakening	I ought to have weakened
you ought to have weakened
she ought to have weakened
we ought to have weakened
you ought to have weakened
they ought to have weakened	I ought to have been weakening
you ought to have been weakening
she ought to have been weakening
we ought to have been weakening
you ought to have been weakening
they ought to have been weakening	

Negation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I oughtn't to weaken
you oughtn't to weaken
she oughtn't to weaken
we oughtn't to weaken
you oughtn't to weaken
they oughtn't to weaken 	I oughtn't to be weakening
you oughtn't to be weakening
she oughtn't to be weakening
we oughtn't to be weakening
you oughtn't to be weakening
they oughtn't to be weakening	I oughtn't to have weakened
you oughtn't to have weakened
she oughtn't to have weakened
we oughtn't to have weakened
you oughtn't to have weakened
they oughtn't to have weakened	I oughtn't to have been weakening
you oughtn't to have been weakening
she oughtn't to have been weakening
we oughtn't to have been weakening
you oughtn't to have been weakening
they oughtn't to have been weakening	

Interrogative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
ought to I weaken?
ought to you weaken?
ought to she weaken?
ought to we weaken?
ought to you weaken?
ought to they weaken? 	ought to I be weakening?
ought to you be weakening?
ought to she be weakening?
ought to we be weakening?
ought to you be weakening?
ought to they be weakening? 	ought to I have weakened?
ought to you have weakened?
ought to she have weakened?
ought to we have weakened?
ought to you have weakened?
ought to they have weakened? 	ought to I have been weakening?
ought to you have been weakening?
ought to she have been weakening?
ought to we have been weakening?
ought to you have been weakening?
ought to they have been weakening? 	

Interro-negative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
oughtn't I to weaken?
oughtn't you to weaken?
oughtn't she to weaken?
oughtn't we to weaken?
oughtn't you to weaken?
oughtn't they to weaken? 	oughtn't I to be weakening?
oughtn't you to be weakening?
oughtn't she to be weakening?
oughtn't we to be weakening?
oughtn't you to be weakening?
oughtn't they to be weakening? 	oughtn't I to have weakened?
oughtn't you to have weakened?
oughtn't she to have weakened?
oughtn't we to have weakened?
oughtn't you to have weakened?
oughtn't they to have weakened? 	oughtn't I to have been weakening?
oughtn't you to have been weakening?
oughtn't she to have been weakening?
oughtn't we to have been weakening?
oughtn't you to have been weakening?
oughtn't they to have been weakening?