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 couldn't mouth you couldn't mouth he couldn't mouth we couldn't mouth you couldn't mouth they couldn't mouth	I couldn't be mouthing you couldn't be mouthing he couldn't be mouthing we couldn't be mouthing you couldn't be mouthing they couldn't be mouthing
Perfect	V-ing perfect
I couldn't have mouthed you couldn't have mouthed he couldn't have mouthed we couldn't have mouthed you couldn't have mouthed they couldn't have mouthed	I couldn't have been mouthing you couldn't have been mouthing he couldn't have been mouthing we couldn't have been mouthing you couldn't have been mouthing they couldn't 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
couldn't I mouth? couldn't you mouth? couldn't he mouth? couldn't we mouth? couldn't you mouth? couldn't they mouth?	couldn't I be mouthing? couldn't you be mouthing? couldn't he be mouthing? couldn't we be mouthing? couldn't you be mouthing? couldn't they be mouthing?
Perfect	V-ing perfect
couldn't I have mouthed? couldn't you have mouthed? couldn't he have mouthed? couldn't we have mouthed? couldn't you have mouthed? couldn't they have mouthed?	couldn't I have been mouthing? couldn't you have been mouthing? couldn't he have been mouthing? couldn't we have been mouthing? couldn't you have been mouthing? couldn't they have been mouthing?