English verb conjugation
COULD IMPUTE

Regular verb: impute - imputed - imputed

Affirmation

Simple form	V-ing form
I could impute you could impute he could impute we could impute you could impute they could impute	I could be imputing you could be imputing he could be imputing we could be imputing you could be imputing they could be imputing
Perfect	V-ing perfect
I could have imputed you could have imputed he could have imputed we could have imputed you could have imputed they could have imputed	I could have been imputing you could have been imputing he could have been imputing we could have been imputing you could have been imputing they could have been imputing

Negation

Simple form	V-ing form
I couldn't impute you couldn't impute he couldn't impute we couldn't impute you couldn't impute they couldn't impute	I couldn't be imputing you couldn't be imputing he couldn't be imputing we couldn't be imputing you couldn't be imputing they couldn't be imputing
Perfect	V-ing perfect
I couldn't have imputed you couldn't have imputed he couldn't have imputed we couldn't have imputed you couldn't have imputed they couldn't have imputed	I couldn't have been imputing you couldn't have been imputing he couldn't have been imputing we couldn't have been imputing you couldn't have been imputing they couldn't have been imputing

Interrogative form

Simple form	V-ing form
could I impute? could you impute? could he impute? could we impute? could you impute? could they impute?	could I be imputing? could you be imputing? could he be imputing? could we be imputing? could you be imputing? could they be imputing?
Perfect	V-ing perfect
could I have imputed? could you have imputed? could he have imputed? could we have imputed? could you have imputed? could they have imputed?	could I have been imputing? could you have been imputing? could he have been imputing? could we have been imputing? could you have been imputing? could they have been imputing?

Interro-negative form

Simple form	V-ing form
couldn't I impute? couldn't you impute? couldn't he impute? couldn't we impute? couldn't you impute? couldn't they impute?	couldn't I be imputing? couldn't you be imputing? couldn't he be imputing? couldn't we be imputing? couldn't you be imputing? couldn't they be imputing?
Perfect	V-ing perfect
couldn't I have imputed? couldn't you have imputed? couldn't he have imputed? couldn't we have imputed? couldn't you have imputed? couldn't they have imputed?	couldn't I have been imputing? couldn't you have been imputing? couldn't he have been imputing? couldn't we have been imputing? couldn't you have been imputing? couldn't they have been imputing?