ought to knock
Regular verb: knock - knocked- knocked

Affirmation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I ought to knock
you ought to knock
she ought to knock
we ought to knock
you ought to knock
they ought to knock 	I ought to be knocking
you ought to be knocking
she ought to be knocking
we ought to be knocking
you ought to be knocking
they ought to be knocking	I ought to have knocked
you ought to have knocked
she ought to have knocked
we ought to have knocked
you ought to have knocked
they ought to have knocked	I ought to have been knocking
you ought to have been knocking
she ought to have been knocking
we ought to have been knocking
you ought to have been knocking
they ought to have been knocking	

Negation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I ought not to knock
you ought not to knock
she ought not to knock
we ought not to knock
you ought not to knock
they ought not to knock 	I ought not to knocking
you ought not to knocking
she ought not to knocking
we ought not to knocking
you ought not to knocking
they ought not to knocking	I ought not to have knocked
you ought not to have knocked
she ought not to have knocked
we ought not to have knocked
you ought not to have knocked
they ought not to have knocked	I ought not to have been knocking
you ought not to have been knocking
she ought not to have been knocking
we ought not to have been knocking
you ought not to have been knocking
they ought not to have been knocking	

Interrogative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
ought to I knock?
ought to you knock?
ought to she knock?
ought to we knock?
ought to you knock?
ought to they knock? 	ought to I be knocking?
ought to you be knocking?
ought to she be knocking?
ought to we be knocking?
ought to you be knocking?
ought to they be knocking? 	ought to I have knocked?
ought to you have knocked?
ought to she have knocked?
ought to we have knocked?
ought to you have knocked?
ought to they have knocked? 	ought to I have been knocking?
ought to you have been knocking?
ought to she have been knocking?
ought to we have been knocking?
ought to you have been knocking?
ought to they have been knocking? 	

Interro-negative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
ought I not to knock?
ought you not to knock?
ought she not to knock?
ought we not to knock?
ought you not to knock?
ought they not to knock? 	ought I not to be knocking?
ought you not to be knocking?
ought she not to be knocking?
ought we not to be knocking?
ought you not to be knocking?
ought they not to be knocking? 	ought I not to have knocked?
ought you not to have knocked?
ought she not to have knocked?
ought we not to have knocked?
ought you not to have knocked?
ought they not to have knocked? 	ought I not to have been knocking?
ought you not to have been knocking?
ought she not to have been knocking?
ought we not to have been knocking?
ought you not to have been knocking?
ought they not to have been knocking?