English verb conjugation COULD CAVERN

Regular verb: cavern - caverned - caverned

Affirmation

Simple form

I could cavern
you could cavern
he could cavern
we could cavern
you could cavern
they could cavern

V-ing form

I could be caverning
you could be caverning
he could be caverning
we could be caverning
you could be caverning
they could be caverning

Perfect

I could have caverned
you could have caverned
he could have caverned
we could have caverned
you could have caverned
they could have caverned

V-ing perfect

I could have been caverning
you could have been caverning
he could have been caverning
we could have been caverning
you could have been caverning
they could have been caverning

Negation

Simple form

I couldn't cavern
you couldn't cavern
he couldn't cavern
we couldn't cavern
you couldn't cavern
they couldn't cavern

V-ing form

I couldn't be caverning
you couldn't be caverning
he couldn't be caverning
we couldn't be caverning
you couldn't be caverning
they couldn't be caverning

Perfect

I couldn't have caverned
you couldn't have caverned
he couldn't have caverned
we couldn't have caverned
you couldn't have caverned
they couldn't have caverned

V-ing perfect

I couldn't have been caverning
you couldn't have been caverning
he couldn't have been caverning
we couldn't have been caverning
you couldn't have been caverning
they couldn't have been caverning

Interrogative form

Simple form

could I cavern?
could you cavern?
could he cavern?
could we cavern?
could you cavern?
could they cavern?

V-ing form

could I be caverning?
could you be caverning?
could he be caverning?
could we be caverning?
could you be caverning?
could they be caverning?

Perfect

could I have caverned?
could you have caverned?
could he have caverned?
could we have caverned?
could you have caverned?
could they have caverned?

V-ing perfect

could I have been caverning?
could you have been caverning?
could he have been caverning?
could we have been caverning?
could you have been caverning?
could they have been caverning?

Interro-negative form

Simple form

couldn't I cavern?
couldn't you cavern?
couldn't he cavern?
couldn't we cavern?
couldn't you cavern?
couldn't they cavern?

V-ing form

couldn't I be caverning?
couldn't you be caverning?
couldn't he be caverning?
couldn't we be caverning?
couldn't you be caverning?
couldn't they be caverning?

Perfect

couldn't I have caverned?
couldn't you have caverned?
couldn't he have caverned?
couldn't we have caverned?
couldn't you have caverned?
couldn't they have caverned?

V-ing perfect

couldn't I have been caverning?
couldn't you have been caverning?
couldn't he have been caverning?
couldn't we have been caverning?
couldn't you have been caverning?
couldn't they have been caverning?

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