I'd be liaising you'd be liaising she'd be liaising we'd be liaising you'd be liaising they'd be liaising
Perfect
I should've liaised you should've liaised she should've liaised we should've liaised you should've liaised they should've liaised
V-ing perfect
I should've been liaising you should've been liaising she should've been liaising we should've been liaising you should've been liaising they should've been liaising
Negation
Simple form
I shouldn't liaise you shouldn't liaise she shouldn't liaise we shouldn't liaise you shouldn't liaise they shouldn't liaise
V-ing form
I shouldn't be liaising you shouldn't be liaising she shouldn't be liaising we shouldn't be liaising you shouldn't be liaising they shouldn't be liaising
Perfect
I shouldn't have liaised you shouldn't have liaised she shouldn't have liaised we shouldn't have liaised you shouldn't have liaised they shouldn't have liaised
V-ing perfect
I shouldn't have been liaising you shouldn't have been liaising she shouldn't have been liaising we shouldn't have been liaising you shouldn't have been liaising they shouldn't have been liaising
Interrogative form
Simple form
should I liaise? should you liaise? should she liaise? should we liaise? should you liaise? should they liaise?
V-ing form
should I be liaising? should you be liaising? should she be liaising? should we be liaising? should you be liaising? should they be liaising?
Perfect
should I have liaised? should you have liaised? should she have liaised? should we have liaised? should you have liaised? should they have liaised?
V-ing perfect
should I have been liaising? should you have been liaising? should she have been liaising? should we have been liaising? should you have been liaising? should they have been liaising?
Interro-negative form
Simple form
shouldn't I liaise? shouldn't you liaise? shouldn't she liaise? shouldn't we liaise? shouldn't you liaise? shouldn't they liaise?
V-ing form
shouldn't I be liaising? shouldn't you be liaising? shouldn't she be liaising? shouldn't we be liaising? shouldn't you be liaising? shouldn't they be liaising?
Perfect
shouldn't I have liaised? shouldn't you have liaised? shouldn't she have liaised? shouldn't we have liaised? shouldn't you have liaised? shouldn't they have liaised?
V-ing perfect
shouldn't I have been liaising? shouldn't you have been liaising? shouldn't she have been liaising? shouldn't we have been liaising? shouldn't you have been liaising? shouldn't they have been liaising?