must underlie
Verbo irregular: underlie - underlay- underlain

Afirmação 	
Forma simple 	Forma com V-ing 	Perfeito 	Perfeito com V-ing 	
I must underlie
you must underlie
he must underlie
we must underlie
you must underlie
they must underlie 	I must be underlying
you must be underlying
he must be underlying
we must be underlying
you must be underlying
they must be underlying	I must have underlain
you must have underlain
he must have underlain
we must have underlain
you must have underlain
they must have underlain	I must have been underlying
you must have been underlying
he must have been underlying
we must have been underlying
you must have been underlying
they must have been underlying	

Negação 	
Forma simple 	Forma com V-ing 	Perfeito 	Perfeito com V-ing 	
I mustn't underlie
you mustn't underlie
he mustn't underlie
we mustn't underlie
you mustn't underlie
they mustn't underlie 	I mustn't be underlying
you mustn't be underlying
he mustn't be underlying
we mustn't be underlying
you mustn't be underlying
they mustn't be underlying	I mustn't have underlain
you mustn't have underlain
he mustn't have underlain
we mustn't have underlain
you mustn't have underlain
they mustn't have underlain	I mustn't have been underlying
you mustn't have been underlying
he mustn't have been underlying
we mustn't have been underlying
you mustn't have been underlying
they mustn't have been underlying	

Forma interrogativa 	
Forma simple 	Forma com V-ing 	Perfeito 	Perfeito com V-ing 	
must I underlie?
must you underlie?
must he underlie?
must we underlie?
must you underlie?
must they underlie? 	must I be underlying?
must you be underlying?
must he be underlying?
must we be underlying?
must you be underlying?
must they be underlying? 	must I have underlain?
must you have underlain?
must he have underlain?
must we have underlain?
must you have underlain?
must they have underlain? 	must I have been underlying?
must you have been underlying?
must he have been underlying?
must we have been underlying?
must you have been underlying?
must they have been underlying? 	

Forma interro-Negação 	
Forma simple 	Forma com V-ing 	Perfeito 	Perfeito com V-ing 	
mustn't I underlie?
mustn't you underlie?
mustn't he underlie?
mustn't we underlie?
mustn't you underlie?
mustn't they underlie? 	mustn't I be underlying?
mustn't you be underlying?
mustn't he be underlying?
mustn't we be underlying?
mustn't you be underlying?
mustn't they be underlying? 	mustn't I have underlain?
mustn't you have underlain?
mustn't he have underlain?
mustn't we have underlain?
mustn't you have underlain?
mustn't they have underlain? 	mustn't I have been underlying?
mustn't you have been underlying?
mustn't he have been underlying?
mustn't we have been underlying?
mustn't you have been underlying?
mustn't they have been underlying?