English verb conjugation
COULD AVOUCH

Regular verb: avouch - avouched - avouched

Affirmation

Simple form	V-ing form
I could avouch you could avouch he could avouch we could avouch you could avouch they could avouch	I could be avouching you could be avouching he could be avouching we could be avouching you could be avouching they could be avouching
Perfect	V-ing perfect
I could have avouched you could have avouched he could have avouched we could have avouched you could have avouched they could have avouched	I could have been avouching you could have been avouching he could have been avouching we could have been avouching you could have been avouching they could have been avouching

Negation

Simple form	V-ing form
I couldn't avouch you couldn't avouch he couldn't avouch we couldn't avouch you couldn't avouch they couldn't avouch	I couldn't be avouching you couldn't be avouching he couldn't be avouching we couldn't be avouching you couldn't be avouching they couldn't be avouching
Perfect	V-ing perfect
I couldn't have avouched you couldn't have avouched he couldn't have avouched we couldn't have avouched you couldn't have avouched they couldn't have avouched	I couldn't have been avouching you couldn't have been avouching he couldn't have been avouching we couldn't have been avouching you couldn't have been avouching they couldn't have been avouching

Interrogative form

Simple form	V-ing form
could I avouch? could you avouch? could he avouch? could we avouch? could you avouch? could they avouch?	could I be avouching? could you be avouching? could he be avouching? could we be avouching? could you be avouching? could they be avouching?
Perfect	V-ing perfect
could I have avouched? could you have avouched? could he have avouched? could we have avouched? could you have avouched? could they have avouched?	could I have been avouching? could you have been avouching? could he have been avouching? could we have been avouching? could you have been avouching? could they have been avouching?

Interro-negative form

Simple form	V-ing form
couldn't I avouch? couldn't you avouch? couldn't he avouch? couldn't we avouch? couldn't you avouch? couldn't they avouch?	couldn't I be avouching? couldn't you be avouching? couldn't he be avouching? couldn't we be avouching? couldn't you be avouching? couldn't they be avouching?
Perfect	V-ing perfect
couldn't I have avouched? couldn't you have avouched? couldn't he have avouched? couldn't we have avouched? couldn't you have avouched? couldn't they have avouched?	couldn't I have been avouching? couldn't you have been avouching? couldn't he have been avouching? couldn't we have been avouching? couldn't you have been avouching? couldn't they have been avouching?