must cavern
Verbo regolare: cavern - caverned- caverned

Affermazione 	
Forma semplice 	Forma con V-ing 	Perfetto 	Perfetto con V-ing 	
I must cavern
you must cavern
she must cavern
we must cavern
you must cavern
they must cavern 	I must be caverning
you must be caverning
she must be caverning
we must be caverning
you must be caverning
they must be caverning	I must have caverned
you must have caverned
she must have caverned
we must have caverned
you must have caverned
they must have caverned	I must have been caverning
you must have been caverning
she must have been caverning
we must have been caverning
you must have been caverning
they must have been caverning	

Negazione 	
Forma semplice 	Forma con V-ing 	Perfetto 	Perfetto con V-ing 	
I must not cavern
you must not cavern
she must not cavern
we must not cavern
you must not cavern
they must not cavern 	I must not be caverning
you must not be caverning
she must not be caverning
we must not be caverning
you must not be caverning
they must not be caverning	I must not have caverned
you must not have caverned
she must not have caverned
we must not have caverned
you must not have caverned
they must not have caverned	I must not have been caverning
you must not have been caverning
she must not have been caverning
we must not have been caverning
you must not have been caverning
they must not have been caverning	

Forma interrogativa 	
Forma semplice 	Forma con V-ing 	Perfetto 	Perfetto con V-ing 	
must I cavern?
must you cavern?
must she cavern?
must we cavern?
must you cavern?
must they cavern? 	must I be caverning?
must you be caverning?
must she be caverning?
must we be caverning?
must you be caverning?
must they be caverning? 	must I have caverned?
must you have caverned?
must she have caverned?
must we have caverned?
must you have caverned?
must they have caverned? 	must I have been caverning?
must you have been caverning?
must she have been caverning?
must we have been caverning?
must you have been caverning?
must they have been caverning? 	

Forma interro-negativa 	
Forma semplice 	Forma con V-ing 	Perfetto 	Perfetto con V-ing 	
must I not cavern?
must you not cavern?
must she not cavern?
must we not cavern?
must you not cavern?
must they not cavern? 	must I not be caverning?
must you not be caverning?
must she not be caverning?
must we not be caverning?
must you not be caverning?
must they not be caverning? 	must I not have caverned?
must you not have caverned?
must she not have caverned?
must we not have caverned?
must you not have caverned?
must they not have caverned? 	must I not have been caverning?
must you not have been caverning?
must she not have been caverning?
must we not have been caverning?
must you not have been caverning?
must they not have been caverning?