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