must predrill
Verbo regular: predrill - predrilled- predrilled

Afirmación 	
Forma simple 	Forma con V-ing 	Perfecto 	Perfecto con V-ing 	
I must predrill
you must predrill
he must predrill
we must predrill
you must predrill
they must predrill 	I must be predrilling
you must be predrilling
he must be predrilling
we must be predrilling
you must be predrilling
they must be predrilling	I must have predrilled
you must have predrilled
he must have predrilled
we must have predrilled
you must have predrilled
they must have predrilled	I must have been predrilling
you must have been predrilling
he must have been predrilling
we must have been predrilling
you must have been predrilling
they must have been predrilling	

Negación 	
Forma simple 	Forma con V-ing 	Perfecto 	Perfecto con V-ing 	
I mustn't predrill
you mustn't predrill
he mustn't predrill
we mustn't predrill
you mustn't predrill
they mustn't predrill 	I mustn't be predrilling
you mustn't be predrilling
he mustn't be predrilling
we mustn't be predrilling
you mustn't be predrilling
they mustn't be predrilling	I mustn't have predrilled
you mustn't have predrilled
he mustn't have predrilled
we mustn't have predrilled
you mustn't have predrilled
they mustn't have predrilled	I mustn't have been predrilling
you mustn't have been predrilling
he mustn't have been predrilling
we mustn't have been predrilling
you mustn't have been predrilling
they mustn't have been predrilling	

Forma interrogativa 	
Forma simple 	Forma con V-ing 	Perfecto 	Perfecto con V-ing 	
must I predrill?
must you predrill?
must he predrill?
must we predrill?
must you predrill?
must they predrill? 	must I be predrilling?
must you be predrilling?
must he be predrilling?
must we be predrilling?
must you be predrilling?
must they be predrilling? 	must I have predrilled?
must you have predrilled?
must he have predrilled?
must we have predrilled?
must you have predrilled?
must they have predrilled? 	must I have been predrilling?
must you have been predrilling?
must he have been predrilling?
must we have been predrilling?
must you have been predrilling?
must they have been predrilling? 	

Forma interro-negativa 	
Forma simple 	Forma con V-ing 	Perfecto 	Perfecto con V-ing 	
mustn't I predrill?
mustn't you predrill?
mustn't he predrill?
mustn't we predrill?
mustn't you predrill?
mustn't they predrill? 	mustn't I be predrilling?
mustn't you be predrilling?
mustn't he be predrilling?
mustn't we be predrilling?
mustn't you be predrilling?
mustn't they be predrilling? 	mustn't I have predrilled?
mustn't you have predrilled?
mustn't he have predrilled?
mustn't we have predrilled?
mustn't you have predrilled?
mustn't they have predrilled? 	mustn't I have been predrilling?
mustn't you have been predrilling?
mustn't he have been predrilling?
mustn't we have been predrilling?
mustn't you have been predrilling?
mustn't they have been predrilling?