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 ought not to undress
you ought not to undress
she ought not to undress
we ought not to undress
you ought not to undress
they ought not to undress 	I ought not to undressing
you ought not to undressing
she ought not to undressing
we ought not to undressing
you ought not to undressing
they ought not to undressing	I ought not to have undressed
you ought not to have undressed
she ought not to have undressed
we ought not to have undressed
you ought not to have undressed
they ought not to have undressed	I ought not to have been undressing
you ought not to have been undressing
she ought not to have been undressing
we ought not to have been undressing
you ought not to have been undressing
they ought not 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 	
ought I not to undress?
ought you not to undress?
ought she not to undress?
ought we not to undress?
ought you not to undress?
ought they not to undress? 	ought I not to be undressing?
ought you not to be undressing?
ought she not to be undressing?
ought we not to be undressing?
ought you not to be undressing?
ought they not to be undressing? 	ought I not to have undressed?
ought you not to have undressed?
ought she not to have undressed?
ought we not to have undressed?
ought you not to have undressed?
ought they not to have undressed? 	ought I not to have been undressing?
ought you not to have been undressing?
ought she not to have been undressing?
ought we not to have been undressing?
ought you not to have been undressing?
ought they not to have been undressing?