could liaise
Regular verb: liaise - liaised- liaised

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

Negation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I could not liaise
you could not liaise
he could not liaise
we could not liaise
you could not liaise
they could not liaise 	I could not be liaising
you could not be liaising
he could not be liaising
we could not be liaising
you could not be liaising
they could not be liaising	I could not have liaised
you could not have liaised
he could not have liaised
we could not have liaised
you could not have liaised
they could not have liaised	I could not have been liaising
you could not have been liaising
he could not have been liaising
we could not have been liaising
you could not have been liaising
they could not have been liaising	

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

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