English verb conjugation
COULD MOUTH

Regular verb: mouth - mouthed - mouthed

Affirmation

Simple form	V-ing form
I could mouth you could mouth he could mouth we could mouth you could mouth they could mouth	I could be mouthing you could be mouthing he could be mouthing we could be mouthing you could be mouthing they could be mouthing
Perfect	V-ing perfect
I could have mouthed you could have mouthed he could have mouthed we could have mouthed you could have mouthed they could have mouthed	I could have been mouthing you could have been mouthing he could have been mouthing we could have been mouthing you could have been mouthing they could have been mouthing

Negation

Simple form	V-ing form
I could not mouth you could not mouth he could not mouth we could not mouth you could not mouth they could not mouth	I could not be mouthing you could not be mouthing he could not be mouthing we could not be mouthing you could not be mouthing they could not be mouthing
Perfect	V-ing perfect
I could not have mouthed you could not have mouthed he could not have mouthed we could not have mouthed you could not have mouthed they could not have mouthed	I could not have been mouthing you could not have been mouthing he could not have been mouthing we could not have been mouthing you could not have been mouthing they could not have been mouthing

Interrogative form

Simple form	V-ing form
could I mouth? could you mouth? could he mouth? could we mouth? could you mouth? could they mouth?	could I be mouthing? could you be mouthing? could he be mouthing? could we be mouthing? could you be mouthing? could they be mouthing?
Perfect	V-ing perfect
could I have mouthed? could you have mouthed? could he have mouthed? could we have mouthed? could you have mouthed? could they have mouthed?	could I have been mouthing? could you have been mouthing? could he have been mouthing? could we have been mouthing? could you have been mouthing? could they have been mouthing?

Interro-negative form

Simple form	V-ing form
could I not mouth? could you not mouth? could he not mouth? could we not mouth? could you not mouth? could they not mouth?	could I not be mouthing? could you not be mouthing? could he not be mouthing? could we not be mouthing? could you not be mouthing? could they not be mouthing?
Perfect	V-ing perfect
could I not have mouthed? could you not have mouthed? could he not have mouthed? could we not have mouthed? could you not have mouthed? could they not have mouthed?	could I not have been mouthing? could you not have been mouthing? could he not have been mouthing? could we not have been mouthing? could you not have been mouthing? could they not have been mouthing?