must level
Verbo regular: level - levelled- levelled

Afirmación 	
Forma simple 	Forma con V-ing 	Perfecto 	Perfecto con V-ing 	
I must level
you must level
he must level
we must level
you must level
they must level 	I must be levelling
you must be levelling
he must be levelling
we must be levelling
you must be levelling
they must be levelling	I must have levelled
you must have levelled
he must have levelled
we must have levelled
you must have levelled
they must have levelled	I must have been levelling
you must have been levelling
he must have been levelling
we must have been levelling
you must have been levelling
they must have been levelling	

Negación 	
Forma simple 	Forma con V-ing 	Perfecto 	Perfecto con V-ing 	
I must not level
you must not level
he must not level
we must not level
you must not level
they must not level 	I must not be levelling
you must not be levelling
he must not be levelling
we must not be levelling
you must not be levelling
they must not be levelling	I must not have levelled
you must not have levelled
he must not have levelled
we must not have levelled
you must not have levelled
they must not have levelled	I must not have been levelling
you must not have been levelling
he must not have been levelling
we must not have been levelling
you must not have been levelling
they must not have been levelling	

Forma interrogativa 	
Forma simple 	Forma con V-ing 	Perfecto 	Perfecto con V-ing 	
must I level?
must you level?
must he level?
must we level?
must you level?
must they level? 	must I be levelling?
must you be levelling?
must he be levelling?
must we be levelling?
must you be levelling?
must they be levelling? 	must I have levelled?
must you have levelled?
must he have levelled?
must we have levelled?
must you have levelled?
must they have levelled? 	must I have been levelling?
must you have been levelling?
must he have been levelling?
must we have been levelling?
must you have been levelling?
must they have been levelling? 	

Forma interro-negativa 	
Forma simple 	Forma con V-ing 	Perfecto 	Perfecto con V-ing 	
must I not level?
must you not level?
must he not level?
must we not level?
must you not level?
must they not level? 	must I not be levelling?
must you not be levelling?
must he not be levelling?
must we not be levelling?
must you not be levelling?
must they not be levelling? 	must I not have levelled?
must you not have levelled?
must he not have levelled?
must we not have levelled?
must you not have levelled?
must they not have levelled? 	must I not have been levelling?
must you not have been levelling?
must he not have been levelling?
must we not have been levelling?
must you not have been levelling?
must they not have been levelling?