English verb conjugation
COULD TEETHE

Regular verb: teethe - teethed - teethed

Affirmation

Simple form	V-ing form
I could teethe you could teethe he could teethe we could teethe you could teethe they could teethe	I could be teething you could be teething he could be teething we could be teething you could be teething they could be teething
Perfect	V-ing perfect
I could have teethed you could have teethed he could have teethed we could have teethed you could have teethed they could have teethed	I could have been teething you could have been teething he could have been teething we could have been teething you could have been teething they could have been teething

Negation

Simple form	V-ing form
I could not teethe you could not teethe he could not teethe we could not teethe you could not teethe they could not teethe	I could not be teething you could not be teething he could not be teething we could not be teething you could not be teething they could not be teething
Perfect	V-ing perfect
I could not have teethed you could not have teethed he could not have teethed we could not have teethed you could not have teethed they could not have teethed	I could not have been teething you could not have been teething he could not have been teething we could not have been teething you could not have been teething they could not have been teething

Interrogative form

Simple form	V-ing form
could I teethe? could you teethe? could he teethe? could we teethe? could you teethe? could they teethe?	could I be teething? could you be teething? could he be teething? could we be teething? could you be teething? could they be teething?
Perfect	V-ing perfect
could I have teethed? could you have teethed? could he have teethed? could we have teethed? could you have teethed? could they have teethed?	could I have been teething? could you have been teething? could he have been teething? could we have been teething? could you have been teething? could they have been teething?

Interro-negative form

Simple form	V-ing form
could I not teethe? could you not teethe? could he not teethe? could we not teethe? could you not teethe? could they not teethe?	could I not be teething? could you not be teething? could he not be teething? could we not be teething? could you not be teething? could they not be teething?
Perfect	V-ing perfect
could I not have teethed? could you not have teethed? could he not have teethed? could we not have teethed? could you not have teethed? could they not have teethed?	could I not have been teething? could you not have been teething? could he not have been teething? could we not have been teething? could you not have been teething? could they not have been teething?