must backpack
Verbo regular: backpack - backpacked- backpacked

Afirmación 	
Forma simple 	Forma con V-ing 	Perfecto 	Perfecto con V-ing 	
I must backpack
you must backpack
he must backpack
we must backpack
you must backpack
they must backpack 	I must be backpacking
you must be backpacking
he must be backpacking
we must be backpacking
you must be backpacking
they must be backpacking	I must have backpacked
you must have backpacked
he must have backpacked
we must have backpacked
you must have backpacked
they must have backpacked	I must have been backpacking
you must have been backpacking
he must have been backpacking
we must have been backpacking
you must have been backpacking
they must have been backpacking	

Negación 	
Forma simple 	Forma con V-ing 	Perfecto 	Perfecto con V-ing 	
I must not backpack
you must not backpack
he must not backpack
we must not backpack
you must not backpack
they must not backpack 	I must not be backpacking
you must not be backpacking
he must not be backpacking
we must not be backpacking
you must not be backpacking
they must not be backpacking	I must not have backpacked
you must not have backpacked
he must not have backpacked
we must not have backpacked
you must not have backpacked
they must not have backpacked	I must not have been backpacking
you must not have been backpacking
he must not have been backpacking
we must not have been backpacking
you must not have been backpacking
they must not have been backpacking	

Forma interrogativa 	
Forma simple 	Forma con V-ing 	Perfecto 	Perfecto con V-ing 	
must I backpack?
must you backpack?
must he backpack?
must we backpack?
must you backpack?
must they backpack? 	must I be backpacking?
must you be backpacking?
must he be backpacking?
must we be backpacking?
must you be backpacking?
must they be backpacking? 	must I have backpacked?
must you have backpacked?
must he have backpacked?
must we have backpacked?
must you have backpacked?
must they have backpacked? 	must I have been backpacking?
must you have been backpacking?
must he have been backpacking?
must we have been backpacking?
must you have been backpacking?
must they have been backpacking? 	

Forma interro-negativa 	
Forma simple 	Forma con V-ing 	Perfecto 	Perfecto con V-ing 	
must I not backpack?
must you not backpack?
must he not backpack?
must we not backpack?
must you not backpack?
must they not backpack? 	must I not be backpacking?
must you not be backpacking?
must he not be backpacking?
must we not be backpacking?
must you not be backpacking?
must they not be backpacking? 	must I not have backpacked?
must you not have backpacked?
must he not have backpacked?
must we not have backpacked?
must you not have backpacked?
must they not have backpacked? 	must I not have been backpacking?
must you not have been backpacking?
must he not have been backpacking?
must we not have been backpacking?
must you not have been backpacking?
must they not have been backpacking?