English verb conjugation
COULD UNDERREPORT

Regular verb: underreport - underreported - underreported

Affirmation

Simple form	V-ing form
I could underreport you could underreport he could underreport we could underreport you could underreport they could underreport	I could be underreporting you could be underreporting he could be underreporting we could be underreporting you could be underreporting they could be underreporting
Perfect	V-ing perfect
I could have underreported you could have underreported he could have underreported we could have underreported you could have underreported they could have underreported	I could have been underreporting you could have been underreporting he could have been underreporting we could have been underreporting you could have been underreporting they could have been underreporting

Negation

Simple form	V-ing form
I couldn't underreport you couldn't underreport he couldn't underreport we couldn't underreport you couldn't underreport they couldn't underreport	I couldn't be underreporting you couldn't be underreporting he couldn't be underreporting we couldn't be underreporting you couldn't be underreporting they couldn't be underreporting
Perfect	V-ing perfect
I couldn't have underreported you couldn't have underreported he couldn't have underreported we couldn't have underreported you couldn't have underreported they couldn't have underreported	I couldn't have been underreporting you couldn't have been underreporting he couldn't have been underreporting we couldn't have been underreporting you couldn't have been underreporting they couldn't have been underreporting

Interrogative form

Simple form	V-ing form
could I underreport? could you underreport? could he underreport? could we underreport? could you underreport? could they underreport?	could I be underreporting? could you be underreporting? could he be underreporting? could we be underreporting? could you be underreporting? could they be underreporting?
Perfect	V-ing perfect
could I have underreported? could you have underreported? could he have underreported? could we have underreported? could you have underreported? could they have underreported?	could I have been underreporting? could you have been underreporting? could he have been underreporting? could we have been underreporting? could you have been underreporting? could they have been underreporting?

Interro-negative form

Simple form	V-ing form
couldn't I underreport? couldn't you underreport? couldn't he underreport? couldn't we underreport? couldn't you underreport? couldn't they underreport?	couldn't I be underreporting? couldn't you be underreporting? couldn't he be underreporting? couldn't we be underreporting? couldn't you be underreporting? couldn't they be underreporting?
Perfect	V-ing perfect
couldn't I have underreported? couldn't you have underreported? couldn't he have underreported? couldn't we have underreported? couldn't you have underreported? couldn't they have underreported?	couldn't I have been underreporting? couldn't you have been underreporting? couldn't he have been underreporting? couldn't we have been underreporting? couldn't you have been underreporting? couldn't they have been underreporting?