must thieve
Verbo regular: thieve - thieved- thieved

Afirmación 	
Forma simple 	Forma con V-ing 	Perfecto 	Perfecto con V-ing 	
I must thieve
you must thieve
he must thieve
we must thieve
you must thieve
they must thieve 	I must be thieving
you must be thieving
he must be thieving
we must be thieving
you must be thieving
they must be thieving	I must have thieved
you must have thieved
he must have thieved
we must have thieved
you must have thieved
they must have thieved	I must have been thieving
you must have been thieving
he must have been thieving
we must have been thieving
you must have been thieving
they must have been thieving	

Negación 	
Forma simple 	Forma con V-ing 	Perfecto 	Perfecto con V-ing 	
I mustn't thieve
you mustn't thieve
he mustn't thieve
we mustn't thieve
you mustn't thieve
they mustn't thieve 	I mustn't be thieving
you mustn't be thieving
he mustn't be thieving
we mustn't be thieving
you mustn't be thieving
they mustn't be thieving	I mustn't have thieved
you mustn't have thieved
he mustn't have thieved
we mustn't have thieved
you mustn't have thieved
they mustn't have thieved	I mustn't have been thieving
you mustn't have been thieving
he mustn't have been thieving
we mustn't have been thieving
you mustn't have been thieving
they mustn't have been thieving	

Forma interrogativa 	
Forma simple 	Forma con V-ing 	Perfecto 	Perfecto con V-ing 	
must I thieve?
must you thieve?
must he thieve?
must we thieve?
must you thieve?
must they thieve? 	must I be thieving?
must you be thieving?
must he be thieving?
must we be thieving?
must you be thieving?
must they be thieving? 	must I have thieved?
must you have thieved?
must he have thieved?
must we have thieved?
must you have thieved?
must they have thieved? 	must I have been thieving?
must you have been thieving?
must he have been thieving?
must we have been thieving?
must you have been thieving?
must they have been thieving? 	

Forma interro-negativa 	
Forma simple 	Forma con V-ing 	Perfecto 	Perfecto con V-ing 	
mustn't I thieve?
mustn't you thieve?
mustn't he thieve?
mustn't we thieve?
mustn't you thieve?
mustn't they thieve? 	mustn't I be thieving?
mustn't you be thieving?
mustn't he be thieving?
mustn't we be thieving?
mustn't you be thieving?
mustn't they be thieving? 	mustn't I have thieved?
mustn't you have thieved?
mustn't he have thieved?
mustn't we have thieved?
mustn't you have thieved?
mustn't they have thieved? 	mustn't I have been thieving?
mustn't you have been thieving?
mustn't he have been thieving?
mustn't we have been thieving?
mustn't you have been thieving?
mustn't they have been thieving?