must liquefy
Regular verb: liquefy - liquefied- liquefied

Affirmation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I must liquefy
you must liquefy
he must liquefy
we must liquefy
you must liquefy
they must liquefy 	I must be liquefying
you must be liquefying
he must be liquefying
we must be liquefying
you must be liquefying
they must be liquefying	I must have liquefied
you must have liquefied
he must have liquefied
we must have liquefied
you must have liquefied
they must have liquefied	I must have been liquefying
you must have been liquefying
he must have been liquefying
we must have been liquefying
you must have been liquefying
they must have been liquefying	

Negation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I mustn't liquefy
you mustn't liquefy
he mustn't liquefy
we mustn't liquefy
you mustn't liquefy
they mustn't liquefy 	I mustn't be liquefying
you mustn't be liquefying
he mustn't be liquefying
we mustn't be liquefying
you mustn't be liquefying
they mustn't be liquefying	I mustn't have liquefied
you mustn't have liquefied
he mustn't have liquefied
we mustn't have liquefied
you mustn't have liquefied
they mustn't have liquefied	I mustn't have been liquefying
you mustn't have been liquefying
he mustn't have been liquefying
we mustn't have been liquefying
you mustn't have been liquefying
they mustn't have been liquefying	

Interrogative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
must I liquefy?
must you liquefy?
must he liquefy?
must we liquefy?
must you liquefy?
must they liquefy? 	must I be liquefying?
must you be liquefying?
must he be liquefying?
must we be liquefying?
must you be liquefying?
must they be liquefying? 	must I have liquefied?
must you have liquefied?
must he have liquefied?
must we have liquefied?
must you have liquefied?
must they have liquefied? 	must I have been liquefying?
must you have been liquefying?
must he have been liquefying?
must we have been liquefying?
must you have been liquefying?
must they have been liquefying? 	

Interro-negative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
mustn't I liquefy?
mustn't you liquefy?
mustn't he liquefy?
mustn't we liquefy?
mustn't you liquefy?
mustn't they liquefy? 	mustn't I be liquefying?
mustn't you be liquefying?
mustn't he be liquefying?
mustn't we be liquefying?
mustn't you be liquefying?
mustn't they be liquefying? 	mustn't I have liquefied?
mustn't you have liquefied?
mustn't he have liquefied?
mustn't we have liquefied?
mustn't you have liquefied?
mustn't they have liquefied? 	mustn't I have been liquefying?
mustn't you have been liquefying?
mustn't he have been liquefying?
mustn't we have been liquefying?
mustn't you have been liquefying?
mustn't they have been liquefying?