ought to undress
Regular verb: undress - undressed- undressed

Affirmation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I ought to undress
you ought to undress
she ought to undress
we ought to undress
you ought to undress
they ought to undress 	I ought to be undressing
you ought to be undressing
she ought to be undressing
we ought to be undressing
you ought to be undressing
they ought to be undressing	I ought to have undressed
you ought to have undressed
she ought to have undressed
we ought to have undressed
you ought to have undressed
they ought to have undressed	I ought to have been undressing
you ought to have been undressing
she ought to have been undressing
we ought to have been undressing
you ought to have been undressing
they ought to have been undressing	

Negation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I oughtn't to undress
you oughtn't to undress
she oughtn't to undress
we oughtn't to undress
you oughtn't to undress
they oughtn't to undress 	I oughtn't to be undressing
you oughtn't to be undressing
she oughtn't to be undressing
we oughtn't to be undressing
you oughtn't to be undressing
they oughtn't to be undressing	I oughtn't to have undressed
you oughtn't to have undressed
she oughtn't to have undressed
we oughtn't to have undressed
you oughtn't to have undressed
they oughtn't to have undressed	I oughtn't to have been undressing
you oughtn't to have been undressing
she oughtn't to have been undressing
we oughtn't to have been undressing
you oughtn't to have been undressing
they oughtn't to have been undressing	

Interrogative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
ought to I undress?
ought to you undress?
ought to she undress?
ought to we undress?
ought to you undress?
ought to they undress? 	ought to I be undressing?
ought to you be undressing?
ought to she be undressing?
ought to we be undressing?
ought to you be undressing?
ought to they be undressing? 	ought to I have undressed?
ought to you have undressed?
ought to she have undressed?
ought to we have undressed?
ought to you have undressed?
ought to they have undressed? 	ought to I have been undressing?
ought to you have been undressing?
ought to she have been undressing?
ought to we have been undressing?
ought to you have been undressing?
ought to they have been undressing? 	

Interro-negative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
oughtn't I to undress?
oughtn't you to undress?
oughtn't she to undress?
oughtn't we to undress?
oughtn't you to undress?
oughtn't they to undress? 	oughtn't I to be undressing?
oughtn't you to be undressing?
oughtn't she to be undressing?
oughtn't we to be undressing?
oughtn't you to be undressing?
oughtn't they to be undressing? 	oughtn't I to have undressed?
oughtn't you to have undressed?
oughtn't she to have undressed?
oughtn't we to have undressed?
oughtn't you to have undressed?
oughtn't they to have undressed? 	oughtn't I to have been undressing?
oughtn't you to have been undressing?
oughtn't she to have been undressing?
oughtn't we to have been undressing?
oughtn't you to have been undressing?
oughtn't they to have been undressing?