must sand
Verbo regular: sand - sanded- sanded

Afirmación 	
Forma simple 	Forma con V-ing 	Perfecto 	Perfecto con V-ing 	
I must sand
you must sand
he must sand
we must sand
you must sand
they must sand 	I must be sanding
you must be sanding
he must be sanding
we must be sanding
you must be sanding
they must be sanding	I must have sanded
you must have sanded
he must have sanded
we must have sanded
you must have sanded
they must have sanded	I must have been sanding
you must have been sanding
he must have been sanding
we must have been sanding
you must have been sanding
they must have been sanding	

Negación 	
Forma simple 	Forma con V-ing 	Perfecto 	Perfecto con V-ing 	
I must not sand
you must not sand
he must not sand
we must not sand
you must not sand
they must not sand 	I must not be sanding
you must not be sanding
he must not be sanding
we must not be sanding
you must not be sanding
they must not be sanding	I must not have sanded
you must not have sanded
he must not have sanded
we must not have sanded
you must not have sanded
they must not have sanded	I must not have been sanding
you must not have been sanding
he must not have been sanding
we must not have been sanding
you must not have been sanding
they must not have been sanding	

Forma interrogativa 	
Forma simple 	Forma con V-ing 	Perfecto 	Perfecto con V-ing 	
must I sand?
must you sand?
must he sand?
must we sand?
must you sand?
must they sand? 	must I be sanding?
must you be sanding?
must he be sanding?
must we be sanding?
must you be sanding?
must they be sanding? 	must I have sanded?
must you have sanded?
must he have sanded?
must we have sanded?
must you have sanded?
must they have sanded? 	must I have been sanding?
must you have been sanding?
must he have been sanding?
must we have been sanding?
must you have been sanding?
must they have been sanding? 	

Forma interro-negativa 	
Forma simple 	Forma con V-ing 	Perfecto 	Perfecto con V-ing 	
must I not sand?
must you not sand?
must he not sand?
must we not sand?
must you not sand?
must they not sand? 	must I not be sanding?
must you not be sanding?
must he not be sanding?
must we not be sanding?
must you not be sanding?
must they not be sanding? 	must I not have sanded?
must you not have sanded?
must he not have sanded?
must we not have sanded?
must you not have sanded?
must they not have sanded? 	must I not have been sanding?
must you not have been sanding?
must he not have been sanding?
must we not have been sanding?
must you not have been sanding?
must they not have been sanding?