English verb conjugation
COULD SEETHE

Regular verb: seethe - seethed - seethed

Affirmation

Simple form	V-ing form
I could seethe you could seethe she could seethe we could seethe you could seethe they could seethe	I could be seething you could be seething she could be seething we could be seething you could be seething they could be seething
Perfect	V-ing perfect
I could have seethed you could have seethed she could have seethed we could have seethed you could have seethed they could have seethed	I could have been seething you could have been seething she could have been seething we could have been seething you could have been seething they could have been seething

Negation

Simple form	V-ing form
I could not seethe you could not seethe she could not seethe we could not seethe you could not seethe they could not seethe	I could not be seething you could not be seething she could not be seething we could not be seething you could not be seething they could not be seething
Perfect	V-ing perfect
I could not have seethed you could not have seethed she could not have seethed we could not have seethed you could not have seethed they could not have seethed	I could not have been seething you could not have been seething she could not have been seething we could not have been seething you could not have been seething they could not have been seething

Interrogative form

Simple form	V-ing form
could I seethe? could you seethe? could she seethe? could we seethe? could you seethe? could they seethe?	could I be seething? could you be seething? could she be seething? could we be seething? could you be seething? could they be seething?
Perfect	V-ing perfect
could I have seethed? could you have seethed? could she have seethed? could we have seethed? could you have seethed? could they have seethed?	could I have been seething? could you have been seething? could she have been seething? could we have been seething? could you have been seething? could they have been seething?

Interro-negative form

Simple form	V-ing form
could I not seethe? could you not seethe? could she not seethe? could we not seethe? could you not seethe? could they not seethe?	could I not be seething? could you not be seething? could she not be seething? could we not be seething? could you not be seething? could they not be seething?
Perfect	V-ing perfect
could I not have seethed? could you not have seethed? could she not have seethed? could we not have seethed? could you not have seethed? could they not have seethed?	could I not have been seething? could you not have been seething? could she not have been seething? could we not have been seething? could you not have been seething? could they not have been seething?