must underline
Verbo regular: underline - underlined- underlined

Afirmação 	
Forma simple 	Forma com V-ing 	Perfeito 	Perfeito com V-ing 	
I must underline
you must underline
he must underline
we must underline
you must underline
they must underline 	I must be underlining
you must be underlining
he must be underlining
we must be underlining
you must be underlining
they must be underlining	I must have underlined
you must have underlined
he must have underlined
we must have underlined
you must have underlined
they must have underlined	I must have been underlining
you must have been underlining
he must have been underlining
we must have been underlining
you must have been underlining
they must have been underlining	

Negação 	
Forma simple 	Forma com V-ing 	Perfeito 	Perfeito com V-ing 	
I mustn't underline
you mustn't underline
he mustn't underline
we mustn't underline
you mustn't underline
they mustn't underline 	I mustn't be underlining
you mustn't be underlining
he mustn't be underlining
we mustn't be underlining
you mustn't be underlining
they mustn't be underlining	I mustn't have underlined
you mustn't have underlined
he mustn't have underlined
we mustn't have underlined
you mustn't have underlined
they mustn't have underlined	I mustn't have been underlining
you mustn't have been underlining
he mustn't have been underlining
we mustn't have been underlining
you mustn't have been underlining
they mustn't have been underlining	

Forma interrogativa 	
Forma simple 	Forma com V-ing 	Perfeito 	Perfeito com V-ing 	
must I underline?
must you underline?
must he underline?
must we underline?
must you underline?
must they underline? 	must I be underlining?
must you be underlining?
must he be underlining?
must we be underlining?
must you be underlining?
must they be underlining? 	must I have underlined?
must you have underlined?
must he have underlined?
must we have underlined?
must you have underlined?
must they have underlined? 	must I have been underlining?
must you have been underlining?
must he have been underlining?
must we have been underlining?
must you have been underlining?
must they have been underlining? 	

Forma interro-Negação 	
Forma simple 	Forma com V-ing 	Perfeito 	Perfeito com V-ing 	
mustn't I underline?
mustn't you underline?
mustn't he underline?
mustn't we underline?
mustn't you underline?
mustn't they underline? 	mustn't I be underlining?
mustn't you be underlining?
mustn't he be underlining?
mustn't we be underlining?
mustn't you be underlining?
mustn't they be underlining? 	mustn't I have underlined?
mustn't you have underlined?
mustn't he have underlined?
mustn't we have underlined?
mustn't you have underlined?
mustn't they have underlined? 	mustn't I have been underlining?
mustn't you have been underlining?
mustn't he have been underlining?
mustn't we have been underlining?
mustn't you have been underlining?
mustn't they have been underlining?