must prattle
Regular verb: prattle - prattled- prattled

Affirmation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I must prattle
you must prattle
he must prattle
we must prattle
you must prattle
they must prattle 	I must be prattling
you must be prattling
he must be prattling
we must be prattling
you must be prattling
they must be prattling	I must have prattled
you must have prattled
he must have prattled
we must have prattled
you must have prattled
they must have prattled	I must have been prattling
you must have been prattling
he must have been prattling
we must have been prattling
you must have been prattling
they must have been prattling	

Negation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I mustn't prattle
you mustn't prattle
he mustn't prattle
we mustn't prattle
you mustn't prattle
they mustn't prattle 	I mustn't be prattling
you mustn't be prattling
he mustn't be prattling
we mustn't be prattling
you mustn't be prattling
they mustn't be prattling	I mustn't have prattled
you mustn't have prattled
he mustn't have prattled
we mustn't have prattled
you mustn't have prattled
they mustn't have prattled	I mustn't have been prattling
you mustn't have been prattling
he mustn't have been prattling
we mustn't have been prattling
you mustn't have been prattling
they mustn't have been prattling	

Interrogative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
must I prattle?
must you prattle?
must he prattle?
must we prattle?
must you prattle?
must they prattle? 	must I be prattling?
must you be prattling?
must he be prattling?
must we be prattling?
must you be prattling?
must they be prattling? 	must I have prattled?
must you have prattled?
must he have prattled?
must we have prattled?
must you have prattled?
must they have prattled? 	must I have been prattling?
must you have been prattling?
must he have been prattling?
must we have been prattling?
must you have been prattling?
must they have been prattling? 	

Interro-negative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
mustn't I prattle?
mustn't you prattle?
mustn't he prattle?
mustn't we prattle?
mustn't you prattle?
mustn't they prattle? 	mustn't I be prattling?
mustn't you be prattling?
mustn't he be prattling?
mustn't we be prattling?
mustn't you be prattling?
mustn't they be prattling? 	mustn't I have prattled?
mustn't you have prattled?
mustn't he have prattled?
mustn't we have prattled?
mustn't you have prattled?
mustn't they have prattled? 	mustn't I have been prattling?
mustn't you have been prattling?
mustn't he have been prattling?
mustn't we have been prattling?
mustn't you have been prattling?
mustn't they have been prattling?