I ought to liaise you ought to liaise she ought to liaise we ought to liaise you ought to liaise they ought to liaise
V-ing form
I ought to be liaising you ought to be liaising she ought to be liaising we ought to be liaising you ought to be liaising they ought to be liaising
Perfect
I ought to have liaised you ought to have liaised she ought to have liaised we ought to have liaised you ought to have liaised they ought to have liaised
V-ing perfect
I ought to have been liaising you ought to have been liaising she ought to have been liaising we ought to have been liaising you ought to have been liaising they ought to have been liaising
Negation
Simple form
I ought not to liaise you ought not to liaise she ought not to liaise we ought not to liaise you ought not to liaise they ought not to liaise
V-ing form
I ought not to liaising you ought not to liaising she ought not to liaising we ought not to liaising you ought not to liaising they ought not to liaising
Perfect
I ought not to have liaised you ought not to have liaised she ought not to have liaised we ought not to have liaised you ought not to have liaised they ought not to have liaised
V-ing perfect
I ought not to have been liaising you ought not to have been liaising she ought not to have been liaising we ought not to have been liaising you ought not to have been liaising they ought not to have been liaising
Interrogative form
Simple form
ought to I liaise? ought to you liaise? ought to she liaise? ought to we liaise? ought to you liaise? ought to they liaise?
V-ing form
ought to I be liaising? ought to you be liaising? ought to she be liaising? ought to we be liaising? ought to you be liaising? ought to they be liaising?
Perfect
ought to I have liaised? ought to you have liaised? ought to she have liaised? ought to we have liaised? ought to you have liaised? ought to they have liaised?
V-ing perfect
ought to I have been liaising? ought to you have been liaising? ought to she have been liaising? ought to we have been liaising? ought to you have been liaising? ought to they have been liaising?
Interro-negative form
Simple form
ought I not to liaise? ought you not to liaise? ought she not to liaise? ought we not to liaise? ought you not to liaise? ought they not to liaise?
V-ing form
ought I not to be liaising? ought you not to be liaising? ought she not to be liaising? ought we not to be liaising? ought you not to be liaising? ought they not to be liaising?
Perfect
ought I not to have liaised? ought you not to have liaised? ought she not to have liaised? ought we not to have liaised? ought you not to have liaised? ought they not to have liaised?
V-ing perfect
ought I not to have been liaising? ought you not to have been liaising? ought she not to have been liaising? ought we not to have been liaising? ought you not to have been liaising? ought they not to have been liaising?