must level
Verbo regular: level - levelled- levelled

Afirmação 	
Forma simple 	Forma com V-ing 	Perfeito 	Perfeito com 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	

Negação 	
Forma simple 	Forma com V-ing 	Perfeito 	Perfeito com V-ing 	
I mustn't level
you mustn't level
he mustn't level
we mustn't level
you mustn't level
they mustn't level 	I mustn't be levelling
you mustn't be levelling
he mustn't be levelling
we mustn't be levelling
you mustn't be levelling
they mustn't be levelling	I mustn't have levelled
you mustn't have levelled
he mustn't have levelled
we mustn't have levelled
you mustn't have levelled
they mustn't have levelled	I mustn't have been levelling
you mustn't have been levelling
he mustn't have been levelling
we mustn't have been levelling
you mustn't have been levelling
they mustn't have been levelling	

Forma interrogativa 	
Forma simple 	Forma com V-ing 	Perfeito 	Perfeito com 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-Negação 	
Forma simple 	Forma com V-ing 	Perfeito 	Perfeito com V-ing 	
mustn't I level?
mustn't you level?
mustn't he level?
mustn't we level?
mustn't you level?
mustn't they level? 	mustn't I be levelling?
mustn't you be levelling?
mustn't he be levelling?
mustn't we be levelling?
mustn't you be levelling?
mustn't they be levelling? 	mustn't I have levelled?
mustn't you have levelled?
mustn't he have levelled?
mustn't we have levelled?
mustn't you have levelled?
mustn't they have levelled? 	mustn't I have been levelling?
mustn't you have been levelling?
mustn't he have been levelling?
mustn't we have been levelling?
mustn't you have been levelling?
mustn't they have been levelling?