must grovel
Verbo regular: grovel - grovelled- grovelled

Afirmación 	
Forma simple 	Forma con V-ing 	Perfecto 	Perfecto con V-ing 	
I must grovel
you must grovel
he must grovel
we must grovel
you must grovel
they must grovel 	I must be grovelling
you must be grovelling
he must be grovelling
we must be grovelling
you must be grovelling
they must be grovelling	I must have grovelled
you must have grovelled
he must have grovelled
we must have grovelled
you must have grovelled
they must have grovelled	I must have been grovelling
you must have been grovelling
he must have been grovelling
we must have been grovelling
you must have been grovelling
they must have been grovelling	

Negación 	
Forma simple 	Forma con V-ing 	Perfecto 	Perfecto con V-ing 	
I must not grovel
you must not grovel
he must not grovel
we must not grovel
you must not grovel
they must not grovel 	I must not be grovelling
you must not be grovelling
he must not be grovelling
we must not be grovelling
you must not be grovelling
they must not be grovelling	I must not have grovelled
you must not have grovelled
he must not have grovelled
we must not have grovelled
you must not have grovelled
they must not have grovelled	I must not have been grovelling
you must not have been grovelling
he must not have been grovelling
we must not have been grovelling
you must not have been grovelling
they must not have been grovelling	

Forma interrogativa 	
Forma simple 	Forma con V-ing 	Perfecto 	Perfecto con V-ing 	
must I grovel?
must you grovel?
must he grovel?
must we grovel?
must you grovel?
must they grovel? 	must I be grovelling?
must you be grovelling?
must he be grovelling?
must we be grovelling?
must you be grovelling?
must they be grovelling? 	must I have grovelled?
must you have grovelled?
must he have grovelled?
must we have grovelled?
must you have grovelled?
must they have grovelled? 	must I have been grovelling?
must you have been grovelling?
must he have been grovelling?
must we have been grovelling?
must you have been grovelling?
must they have been grovelling? 	

Forma interro-negativa 	
Forma simple 	Forma con V-ing 	Perfecto 	Perfecto con V-ing 	
must I not grovel?
must you not grovel?
must he not grovel?
must we not grovel?
must you not grovel?
must they not grovel? 	must I not be grovelling?
must you not be grovelling?
must he not be grovelling?
must we not be grovelling?
must you not be grovelling?
must they not be grovelling? 	must I not have grovelled?
must you not have grovelled?
must he not have grovelled?
must we not have grovelled?
must you not have grovelled?
must they not have grovelled? 	must I not have been grovelling?
must you not have been grovelling?
must he not have been grovelling?
must we not have been grovelling?
must you not have been grovelling?
must they not have been grovelling?