ought to whiten
Regular verb: whiten - whitened- whitened

Affirmation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I ought to whiten
you ought to whiten
she ought to whiten
we ought to whiten
you ought to whiten
they ought to whiten 	I ought to be whitening
you ought to be whitening
she ought to be whitening
we ought to be whitening
you ought to be whitening
they ought to be whitening	I ought to have whitened
you ought to have whitened
she ought to have whitened
we ought to have whitened
you ought to have whitened
they ought to have whitened	I ought to have been whitening
you ought to have been whitening
she ought to have been whitening
we ought to have been whitening
you ought to have been whitening
they ought to have been whitening	

Negation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I ought not to whiten
you ought not to whiten
she ought not to whiten
we ought not to whiten
you ought not to whiten
they ought not to whiten 	I ought not to whitening
you ought not to whitening
she ought not to whitening
we ought not to whitening
you ought not to whitening
they ought not to whitening	I ought not to have whitened
you ought not to have whitened
she ought not to have whitened
we ought not to have whitened
you ought not to have whitened
they ought not to have whitened	I ought not to have been whitening
you ought not to have been whitening
she ought not to have been whitening
we ought not to have been whitening
you ought not to have been whitening
they ought not to have been whitening	

Interrogative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
ought to I whiten?
ought to you whiten?
ought to she whiten?
ought to we whiten?
ought to you whiten?
ought to they whiten? 	ought to I be whitening?
ought to you be whitening?
ought to she be whitening?
ought to we be whitening?
ought to you be whitening?
ought to they be whitening? 	ought to I have whitened?
ought to you have whitened?
ought to she have whitened?
ought to we have whitened?
ought to you have whitened?
ought to they have whitened? 	ought to I have been whitening?
ought to you have been whitening?
ought to she have been whitening?
ought to we have been whitening?
ought to you have been whitening?
ought to they have been whitening? 	

Interro-negative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
ought I not to whiten?
ought you not to whiten?
ought she not to whiten?
ought we not to whiten?
ought you not to whiten?
ought they not to whiten? 	ought I not to be whitening?
ought you not to be whitening?
ought she not to be whitening?
ought we not to be whitening?
ought you not to be whitening?
ought they not to be whitening? 	ought I not to have whitened?
ought you not to have whitened?
ought she not to have whitened?
ought we not to have whitened?
ought you not to have whitened?
ought they not to have whitened? 	ought I not to have been whitening?
ought you not to have been whitening?
ought she not to have been whitening?
ought we not to have been whitening?
ought you not to have been whitening?
ought they not to have been whitening?