must liaise
Regular verb: liaise - liaised- liaised

Affirmation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I must liaise
you must liaise
he must liaise
we must liaise
you must liaise
they must liaise 	I must be liaising
you must be liaising
he must be liaising
we must be liaising
you must be liaising
they must be liaising	I must have liaised
you must have liaised
he must have liaised
we must have liaised
you must have liaised
they must have liaised	I must have been liaising
you must have been liaising
he must have been liaising
we must have been liaising
you must have been liaising
they must have been liaising	

Negation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I mustn't liaise
you mustn't liaise
he mustn't liaise
we mustn't liaise
you mustn't liaise
they mustn't liaise 	I mustn't be liaising
you mustn't be liaising
he mustn't be liaising
we mustn't be liaising
you mustn't be liaising
they mustn't be liaising	I mustn't have liaised
you mustn't have liaised
he mustn't have liaised
we mustn't have liaised
you mustn't have liaised
they mustn't have liaised	I mustn't have been liaising
you mustn't have been liaising
he mustn't have been liaising
we mustn't have been liaising
you mustn't have been liaising
they mustn't have been liaising	

Interrogative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
must I liaise?
must you liaise?
must he liaise?
must we liaise?
must you liaise?
must they liaise? 	must I be liaising?
must you be liaising?
must he be liaising?
must we be liaising?
must you be liaising?
must they be liaising? 	must I have liaised?
must you have liaised?
must he have liaised?
must we have liaised?
must you have liaised?
must they have liaised? 	must I have been liaising?
must you have been liaising?
must he have been liaising?
must we have been liaising?
must you have been liaising?
must they have been liaising? 	

Interro-negative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
mustn't I liaise?
mustn't you liaise?
mustn't he liaise?
mustn't we liaise?
mustn't you liaise?
mustn't they liaise? 	mustn't I be liaising?
mustn't you be liaising?
mustn't he be liaising?
mustn't we be liaising?
mustn't you be liaising?
mustn't they be liaising? 	mustn't I have liaised?
mustn't you have liaised?
mustn't he have liaised?
mustn't we have liaised?
mustn't you have liaised?
mustn't they have liaised? 	mustn't I have been liaising?
mustn't you have been liaising?
mustn't he have been liaising?
mustn't we have been liaising?
mustn't you have been liaising?
mustn't they have been liaising?