must underline
Verbo regular: underline - underlined- underlined

Afirmación 	
Forma simple 	Forma con V-ing 	Perfecto 	Perfecto con V-ing 	
I must underline
you must underline
she must underline
we must underline
you must underline
they must underline 	I must be underlining
you must be underlining
she must be underlining
we must be underlining
you must be underlining
they must be underlining	I must have underlined
you must have underlined
she 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
she must have been underlining
we must have been underlining
you must have been underlining
they must have been underlining	

Negación 	
Forma simple 	Forma con V-ing 	Perfecto 	Perfecto con V-ing 	
I must not underline
you must not underline
she must not underline
we must not underline
you must not underline
they must not underline 	I must not be underlining
you must not be underlining
she must not be underlining
we must not be underlining
you must not be underlining
they must not be underlining	I must not have underlined
you must not have underlined
she must not have underlined
we must not have underlined
you must not have underlined
they must not have underlined	I must not have been underlining
you must not have been underlining
she must not have been underlining
we must not have been underlining
you must not have been underlining
they must not have been underlining	

Forma interrogativa 	
Forma simple 	Forma con V-ing 	Perfecto 	Perfecto con V-ing 	
must I underline?
must you underline?
must she underline?
must we underline?
must you underline?
must they underline? 	must I be underlining?
must you be underlining?
must she be underlining?
must we be underlining?
must you be underlining?
must they be underlining? 	must I have underlined?
must you have underlined?
must she 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 she have been underlining?
must we have been underlining?
must you have been underlining?
must they have been underlining? 	

Forma interro-negativa 	
Forma simple 	Forma con V-ing 	Perfecto 	Perfecto con V-ing 	
must I not underline?
must you not underline?
must she not underline?
must we not underline?
must you not underline?
must they not underline? 	must I not be underlining?
must you not be underlining?
must she not be underlining?
must we not be underlining?
must you not be underlining?
must they not be underlining? 	must I not have underlined?
must you not have underlined?
must she not have underlined?
must we not have underlined?
must you not have underlined?
must they not have underlined? 	must I not have been underlining?
must you not have been underlining?
must she not have been underlining?
must we not have been underlining?
must you not have been underlining?
must they not have been underlining?