must prattle
Regular verb: prattle - prattled- prattled

Affirmation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I must prattle
you must prattle
she must prattle
we must prattle
you must prattle
they must prattle 	I must be prattling
you must be prattling
she must be prattling
we must be prattling
you must be prattling
they must be prattling	I must have prattled
you must have prattled
she 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
she 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
she 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
she 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
she 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
she 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 she prattle?
must we prattle?
must you prattle?
must they prattle? 	must I be prattling?
must you be prattling?
must she be prattling?
must we be prattling?
must you be prattling?
must they be prattling? 	must I have prattled?
must you have prattled?
must she 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 she 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 she 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 she 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 she 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 she have been prattling?
mustn't we have been prattling?
mustn't you have been prattling?
mustn't they have been prattling?