must thud
Verbo regular: thud - thudded- thudded

Afirmación 	
Forma simple 	Forma con V-ing 	Perfecto 	Perfecto con V-ing 	
I must thud
you must thud
he must thud
we must thud
you must thud
they must thud 	I must be thudding
you must be thudding
he must be thudding
we must be thudding
you must be thudding
they must be thudding	I must have thudded
you must have thudded
he must have thudded
we must have thudded
you must have thudded
they must have thudded	I must have been thudding
you must have been thudding
he must have been thudding
we must have been thudding
you must have been thudding
they must have been thudding	

Negación 	
Forma simple 	Forma con V-ing 	Perfecto 	Perfecto con V-ing 	
I mustn't thud
you mustn't thud
he mustn't thud
we mustn't thud
you mustn't thud
they mustn't thud 	I mustn't be thudding
you mustn't be thudding
he mustn't be thudding
we mustn't be thudding
you mustn't be thudding
they mustn't be thudding	I mustn't have thudded
you mustn't have thudded
he mustn't have thudded
we mustn't have thudded
you mustn't have thudded
they mustn't have thudded	I mustn't have been thudding
you mustn't have been thudding
he mustn't have been thudding
we mustn't have been thudding
you mustn't have been thudding
they mustn't have been thudding	

Forma interrogativa 	
Forma simple 	Forma con V-ing 	Perfecto 	Perfecto con V-ing 	
must I thud?
must you thud?
must he thud?
must we thud?
must you thud?
must they thud? 	must I be thudding?
must you be thudding?
must he be thudding?
must we be thudding?
must you be thudding?
must they be thudding? 	must I have thudded?
must you have thudded?
must he have thudded?
must we have thudded?
must you have thudded?
must they have thudded? 	must I have been thudding?
must you have been thudding?
must he have been thudding?
must we have been thudding?
must you have been thudding?
must they have been thudding? 	

Forma interro-negativa 	
Forma simple 	Forma con V-ing 	Perfecto 	Perfecto con V-ing 	
mustn't I thud?
mustn't you thud?
mustn't he thud?
mustn't we thud?
mustn't you thud?
mustn't they thud? 	mustn't I be thudding?
mustn't you be thudding?
mustn't he be thudding?
mustn't we be thudding?
mustn't you be thudding?
mustn't they be thudding? 	mustn't I have thudded?
mustn't you have thudded?
mustn't he have thudded?
mustn't we have thudded?
mustn't you have thudded?
mustn't they have thudded? 	mustn't I have been thudding?
mustn't you have been thudding?
mustn't he have been thudding?
mustn't we have been thudding?
mustn't you have been thudding?
mustn't they have been thudding?