must procrastinate
Verbo regular: procrastinate - procrastinated- procrastinated

Afirmación 	
Forma simple 	Forma con V-ing 	Perfecto 	Perfecto con V-ing 	
I must procrastinate
you must procrastinate
he must procrastinate
we must procrastinate
you must procrastinate
they must procrastinate 	I must be procrastinating
you must be procrastinating
he must be procrastinating
we must be procrastinating
you must be procrastinating
they must be procrastinating	I must have procrastinated
you must have procrastinated
he must have procrastinated
we must have procrastinated
you must have procrastinated
they must have procrastinated	I must have been procrastinating
you must have been procrastinating
he must have been procrastinating
we must have been procrastinating
you must have been procrastinating
they must have been procrastinating	

Negación 	
Forma simple 	Forma con V-ing 	Perfecto 	Perfecto con V-ing 	
I mustn't procrastinate
you mustn't procrastinate
he mustn't procrastinate
we mustn't procrastinate
you mustn't procrastinate
they mustn't procrastinate 	I mustn't be procrastinating
you mustn't be procrastinating
he mustn't be procrastinating
we mustn't be procrastinating
you mustn't be procrastinating
they mustn't be procrastinating	I mustn't have procrastinated
you mustn't have procrastinated
he mustn't have procrastinated
we mustn't have procrastinated
you mustn't have procrastinated
they mustn't have procrastinated	I mustn't have been procrastinating
you mustn't have been procrastinating
he mustn't have been procrastinating
we mustn't have been procrastinating
you mustn't have been procrastinating
they mustn't have been procrastinating	

Forma interrogativa 	
Forma simple 	Forma con V-ing 	Perfecto 	Perfecto con V-ing 	
must I procrastinate?
must you procrastinate?
must he procrastinate?
must we procrastinate?
must you procrastinate?
must they procrastinate? 	must I be procrastinating?
must you be procrastinating?
must he be procrastinating?
must we be procrastinating?
must you be procrastinating?
must they be procrastinating? 	must I have procrastinated?
must you have procrastinated?
must he have procrastinated?
must we have procrastinated?
must you have procrastinated?
must they have procrastinated? 	must I have been procrastinating?
must you have been procrastinating?
must he have been procrastinating?
must we have been procrastinating?
must you have been procrastinating?
must they have been procrastinating? 	

Forma interro-negativa 	
Forma simple 	Forma con V-ing 	Perfecto 	Perfecto con V-ing 	
mustn't I procrastinate?
mustn't you procrastinate?
mustn't he procrastinate?
mustn't we procrastinate?
mustn't you procrastinate?
mustn't they procrastinate? 	mustn't I be procrastinating?
mustn't you be procrastinating?
mustn't he be procrastinating?
mustn't we be procrastinating?
mustn't you be procrastinating?
mustn't they be procrastinating? 	mustn't I have procrastinated?
mustn't you have procrastinated?
mustn't he have procrastinated?
mustn't we have procrastinated?
mustn't you have procrastinated?
mustn't they have procrastinated? 	mustn't I have been procrastinating?
mustn't you have been procrastinating?
mustn't he have been procrastinating?
mustn't we have been procrastinating?
mustn't you have been procrastinating?
mustn't they have been procrastinating?