should cavern
Regular verb: cavern - caverned- caverned

Affirmation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I'd cavern
you'd cavern
he'd cavern
we'd cavern
you'd cavern
they'd cavern 	I'd be caverning
you'd be caverning
he'd be caverning
we'd be caverning
you'd be caverning
they'd be caverning	I should've caverned
you should've caverned
he should've caverned
we should've caverned
you should've caverned
they should've caverned	I should've been caverning
you should've been caverning
he should've been caverning
we should've been caverning
you should've been caverning
they should've been caverning	

Negation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I shouldn't cavern
you shouldn't cavern
he shouldn't cavern
we shouldn't cavern
you shouldn't cavern
they shouldn't cavern 	I shouldn't be caverning
you shouldn't be caverning
he shouldn't be caverning
we shouldn't be caverning
you shouldn't be caverning
they shouldn't be caverning	I shouldn't have caverned
you shouldn't have caverned
he shouldn't have caverned
we shouldn't have caverned
you shouldn't have caverned
they shouldn't have caverned	I shouldn't have been caverning
you shouldn't have been caverning
he shouldn't have been caverning
we shouldn't have been caverning
you shouldn't have been caverning
they shouldn't have been caverning	

Interrogative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
should I cavern?
should you cavern?
should he cavern?
should we cavern?
should you cavern?
should they cavern? 	should I be caverning?
should you be caverning?
should he be caverning?
should we be caverning?
should you be caverning?
should they be caverning? 	should I have caverned?
should you have caverned?
should he have caverned?
should we have caverned?
should you have caverned?
should they have caverned? 	should I have been caverning?
should you have been caverning?
should he have been caverning?
should we have been caverning?
should you have been caverning?
should they have been caverning? 	

Interro-negative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
shouldn't I cavern?
shouldn't you cavern?
shouldn't he cavern?
shouldn't we cavern?
shouldn't you cavern?
shouldn't they cavern? 	shouldn't I be caverning?
shouldn't you be caverning?
shouldn't he be caverning?
shouldn't we be caverning?
shouldn't you be caverning?
shouldn't they be caverning? 	shouldn't I have caverned?
shouldn't you have caverned?
shouldn't he have caverned?
shouldn't we have caverned?
shouldn't you have caverned?
shouldn't they have caverned? 	shouldn't I have been caverning?
shouldn't you have been caverning?
shouldn't he have been caverning?
shouldn't we have been caverning?
shouldn't you have been caverning?
shouldn't they have been caverning?