English verb conjugation
CAN CAVERN

Regular verb: cavern - caverned - caverned

Affirmation

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

Negation

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

Interrogative form

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

Interro-negative form

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