English verb conjugation
COULD TEETHE

Regular verb: teethe - teethed - teethed

Affirmation

Simple form	V-ing form
I could teethe you could teethe she could teethe we could teethe you could teethe they could teethe	I could be teething you could be teething she 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 she 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 she 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 couldn't teethe you couldn't teethe she couldn't teethe we couldn't teethe you couldn't teethe they couldn't teethe	I couldn't be teething you couldn't be teething she couldn't be teething we couldn't be teething you couldn't be teething they couldn't be teething
Perfect	V-ing perfect
I couldn't have teethed you couldn't have teethed she couldn't have teethed we couldn't have teethed you couldn't have teethed they couldn't have teethed	I couldn't have been teething you couldn't have been teething she couldn't have been teething we couldn't have been teething you couldn't have been teething they couldn't have been teething

Interrogative form

Simple form	V-ing form
could I teethe? could you teethe? could she teethe? could we teethe? could you teethe? could they teethe?	could I be teething? could you be teething? could she 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 she 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 she 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
couldn't I teethe? couldn't you teethe? couldn't she teethe? couldn't we teethe? couldn't you teethe? couldn't they teethe?	couldn't I be teething? couldn't you be teething? couldn't she be teething? couldn't we be teething? couldn't you be teething? couldn't they be teething?
Perfect	V-ing perfect
couldn't I have teethed? couldn't you have teethed? couldn't she have teethed? couldn't we have teethed? couldn't you have teethed? couldn't they have teethed?	couldn't I have been teething? couldn't you have been teething? couldn't she have been teething? couldn't we have been teething? couldn't you have been teething? couldn't they have been teething?