English verb conjugation
OUGHT TO SIEVE

Regular verb: sieve - sieved - sieved

Affirmation

Simple form	V-ing form
I ought to sieve you ought to sieve she ought to sieve we ought to sieve you ought to sieve they ought to sieve	I ought to be sieving you ought to be sieving she ought to be sieving we ought to be sieving you ought to be sieving they ought to be sieving
Perfect	V-ing perfect
I ought to have sieved you ought to have sieved she ought to have sieved we ought to have sieved you ought to have sieved they ought to have sieved	I ought to have been sieving you ought to have been sieving she ought to have been sieving we ought to have been sieving you ought to have been sieving they ought to have been sieving

Negation

Simple form	V-ing form
I ought not to sieve you ought not to sieve she ought not to sieve we ought not to sieve you ought not to sieve they ought not to sieve	I ought not to sieving you ought not to sieving she ought not to sieving we ought not to sieving you ought not to sieving they ought not to sieving
Perfect	V-ing perfect
I ought not to have sieved you ought not to have sieved she ought not to have sieved we ought not to have sieved you ought not to have sieved they ought not to have sieved	I ought not to have been sieving you ought not to have been sieving she ought not to have been sieving we ought not to have been sieving you ought not to have been sieving they ought not to have been sieving

Interrogative form

Simple form	V-ing form
ought to I sieve? ought to you sieve? ought to she sieve? ought to we sieve? ought to you sieve? ought to they sieve?	ought to I be sieving? ought to you be sieving? ought to she be sieving? ought to we be sieving? ought to you be sieving? ought to they be sieving?
Perfect	V-ing perfect
ought to I have sieved? ought to you have sieved? ought to she have sieved? ought to we have sieved? ought to you have sieved? ought to they have sieved?	ought to I have been sieving? ought to you have been sieving? ought to she have been sieving? ought to we have been sieving? ought to you have been sieving? ought to they have been sieving?

Interro-negative form

Simple form	V-ing form
ought I not to sieve? ought you not to sieve? ought she not to sieve? ought we not to sieve? ought you not to sieve? ought they not to sieve?	ought I not to be sieving? ought you not to be sieving? ought she not to be sieving? ought we not to be sieving? ought you not to be sieving? ought they not to be sieving?
Perfect	V-ing perfect
ought I not to have sieved? ought you not to have sieved? ought she not to have sieved? ought we not to have sieved? ought you not to have sieved? ought they not to have sieved?	ought I not to have been sieving? ought you not to have been sieving? ought she not to have been sieving? ought we not to have been sieving? ought you not to have been sieving? ought they not to have been sieving?