must shelter
Verbo regular: shelter - sheltered- sheltered

Afirmación 	
Forma simple 	Forma con V-ing 	Perfecto 	Perfecto con V-ing 	
I must shelter
you must shelter
he must shelter
we must shelter
you must shelter
they must shelter 	I must be sheltering
you must be sheltering
he must be sheltering
we must be sheltering
you must be sheltering
they must be sheltering	I must have sheltered
you must have sheltered
he must have sheltered
we must have sheltered
you must have sheltered
they must have sheltered	I must have been sheltering
you must have been sheltering
he must have been sheltering
we must have been sheltering
you must have been sheltering
they must have been sheltering	

Negación 	
Forma simple 	Forma con V-ing 	Perfecto 	Perfecto con V-ing 	
I must not shelter
you must not shelter
he must not shelter
we must not shelter
you must not shelter
they must not shelter 	I must not be sheltering
you must not be sheltering
he must not be sheltering
we must not be sheltering
you must not be sheltering
they must not be sheltering	I must not have sheltered
you must not have sheltered
he must not have sheltered
we must not have sheltered
you must not have sheltered
they must not have sheltered	I must not have been sheltering
you must not have been sheltering
he must not have been sheltering
we must not have been sheltering
you must not have been sheltering
they must not have been sheltering	

Forma interrogativa 	
Forma simple 	Forma con V-ing 	Perfecto 	Perfecto con V-ing 	
must I shelter?
must you shelter?
must he shelter?
must we shelter?
must you shelter?
must they shelter? 	must I be sheltering?
must you be sheltering?
must he be sheltering?
must we be sheltering?
must you be sheltering?
must they be sheltering? 	must I have sheltered?
must you have sheltered?
must he have sheltered?
must we have sheltered?
must you have sheltered?
must they have sheltered? 	must I have been sheltering?
must you have been sheltering?
must he have been sheltering?
must we have been sheltering?
must you have been sheltering?
must they have been sheltering? 	

Forma interro-negativa 	
Forma simple 	Forma con V-ing 	Perfecto 	Perfecto con V-ing 	
must I not shelter?
must you not shelter?
must he not shelter?
must we not shelter?
must you not shelter?
must they not shelter? 	must I not be sheltering?
must you not be sheltering?
must he not be sheltering?
must we not be sheltering?
must you not be sheltering?
must they not be sheltering? 	must I not have sheltered?
must you not have sheltered?
must he not have sheltered?
must we not have sheltered?
must you not have sheltered?
must they not have sheltered? 	must I not have been sheltering?
must you not have been sheltering?
must he not have been sheltering?
must we not have been sheltering?
must you not have been sheltering?
must they not have been sheltering?