must narrow
Verbo regular: narrow - narrowed- narrowed

Afirmación 	
Forma simple 	Forma con V-ing 	Perfecto 	Perfecto con V-ing 	
I must narrow
you must narrow
he must narrow
we must narrow
you must narrow
they must narrow 	I must be narrowing
you must be narrowing
he must be narrowing
we must be narrowing
you must be narrowing
they must be narrowing	I must have narrowed
you must have narrowed
he must have narrowed
we must have narrowed
you must have narrowed
they must have narrowed	I must have been narrowing
you must have been narrowing
he must have been narrowing
we must have been narrowing
you must have been narrowing
they must have been narrowing	

Negación 	
Forma simple 	Forma con V-ing 	Perfecto 	Perfecto con V-ing 	
I must not narrow
you must not narrow
he must not narrow
we must not narrow
you must not narrow
they must not narrow 	I must not be narrowing
you must not be narrowing
he must not be narrowing
we must not be narrowing
you must not be narrowing
they must not be narrowing	I must not have narrowed
you must not have narrowed
he must not have narrowed
we must not have narrowed
you must not have narrowed
they must not have narrowed	I must not have been narrowing
you must not have been narrowing
he must not have been narrowing
we must not have been narrowing
you must not have been narrowing
they must not have been narrowing	

Forma interrogativa 	
Forma simple 	Forma con V-ing 	Perfecto 	Perfecto con V-ing 	
must I narrow?
must you narrow?
must he narrow?
must we narrow?
must you narrow?
must they narrow? 	must I be narrowing?
must you be narrowing?
must he be narrowing?
must we be narrowing?
must you be narrowing?
must they be narrowing? 	must I have narrowed?
must you have narrowed?
must he have narrowed?
must we have narrowed?
must you have narrowed?
must they have narrowed? 	must I have been narrowing?
must you have been narrowing?
must he have been narrowing?
must we have been narrowing?
must you have been narrowing?
must they have been narrowing? 	

Forma interro-negativa 	
Forma simple 	Forma con V-ing 	Perfecto 	Perfecto con V-ing 	
must I not narrow?
must you not narrow?
must he not narrow?
must we not narrow?
must you not narrow?
must they not narrow? 	must I not be narrowing?
must you not be narrowing?
must he not be narrowing?
must we not be narrowing?
must you not be narrowing?
must they not be narrowing? 	must I not have narrowed?
must you not have narrowed?
must he not have narrowed?
must we not have narrowed?
must you not have narrowed?
must they not have narrowed? 	must I not have been narrowing?
must you not have been narrowing?
must he not have been narrowing?
must we not have been narrowing?
must you not have been narrowing?
must they not have been narrowing?