must putter
Regular verb: putter - puttered- puttered

Affirmation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I must putter
you must putter
he must putter
we must putter
you must putter
they must putter 	I must be puttering
you must be puttering
he must be puttering
we must be puttering
you must be puttering
they must be puttering	I must have puttered
you must have puttered
he must have puttered
we must have puttered
you must have puttered
they must have puttered	I must have been puttering
you must have been puttering
he must have been puttering
we must have been puttering
you must have been puttering
they must have been puttering	

Negation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I mustn't putter
you mustn't putter
he mustn't putter
we mustn't putter
you mustn't putter
they mustn't putter 	I mustn't be puttering
you mustn't be puttering
he mustn't be puttering
we mustn't be puttering
you mustn't be puttering
they mustn't be puttering	I mustn't have puttered
you mustn't have puttered
he mustn't have puttered
we mustn't have puttered
you mustn't have puttered
they mustn't have puttered	I mustn't have been puttering
you mustn't have been puttering
he mustn't have been puttering
we mustn't have been puttering
you mustn't have been puttering
they mustn't have been puttering	

Interrogative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
must I putter?
must you putter?
must he putter?
must we putter?
must you putter?
must they putter? 	must I be puttering?
must you be puttering?
must he be puttering?
must we be puttering?
must you be puttering?
must they be puttering? 	must I have puttered?
must you have puttered?
must he have puttered?
must we have puttered?
must you have puttered?
must they have puttered? 	must I have been puttering?
must you have been puttering?
must he have been puttering?
must we have been puttering?
must you have been puttering?
must they have been puttering? 	

Interro-negative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
mustn't I putter?
mustn't you putter?
mustn't he putter?
mustn't we putter?
mustn't you putter?
mustn't they putter? 	mustn't I be puttering?
mustn't you be puttering?
mustn't he be puttering?
mustn't we be puttering?
mustn't you be puttering?
mustn't they be puttering? 	mustn't I have puttered?
mustn't you have puttered?
mustn't he have puttered?
mustn't we have puttered?
mustn't you have puttered?
mustn't they have puttered? 	mustn't I have been puttering?
mustn't you have been puttering?
mustn't he have been puttering?
mustn't we have been puttering?
mustn't you have been puttering?
mustn't they have been puttering?