English verb conjugation
COULD UNDERRATE

Regular verb: underrate - underrated - underrated

Affirmation

Simple form	V-ing form
I could underrate you could underrate he could underrate we could underrate you could underrate they could underrate	I could be underrating you could be underrating he could be underrating we could be underrating you could be underrating they could be underrating
Perfect	V-ing perfect
I could have underrated you could have underrated he could have underrated we could have underrated you could have underrated they could have underrated	I could have been underrating you could have been underrating he could have been underrating we could have been underrating you could have been underrating they could have been underrating

Negation

Simple form	V-ing form
I couldn't underrate you couldn't underrate he couldn't underrate we couldn't underrate you couldn't underrate they couldn't underrate	I couldn't be underrating you couldn't be underrating he couldn't be underrating we couldn't be underrating you couldn't be underrating they couldn't be underrating
Perfect	V-ing perfect
I couldn't have underrated you couldn't have underrated he couldn't have underrated we couldn't have underrated you couldn't have underrated they couldn't have underrated	I couldn't have been underrating you couldn't have been underrating he couldn't have been underrating we couldn't have been underrating you couldn't have been underrating they couldn't have been underrating

Interrogative form

Simple form	V-ing form
could I underrate? could you underrate? could he underrate? could we underrate? could you underrate? could they underrate?	could I be underrating? could you be underrating? could he be underrating? could we be underrating? could you be underrating? could they be underrating?
Perfect	V-ing perfect
could I have underrated? could you have underrated? could he have underrated? could we have underrated? could you have underrated? could they have underrated?	could I have been underrating? could you have been underrating? could he have been underrating? could we have been underrating? could you have been underrating? could they have been underrating?

Interro-negative form

Simple form	V-ing form
couldn't I underrate? couldn't you underrate? couldn't he underrate? couldn't we underrate? couldn't you underrate? couldn't they underrate?	couldn't I be underrating? couldn't you be underrating? couldn't he be underrating? couldn't we be underrating? couldn't you be underrating? couldn't they be underrating?
Perfect	V-ing perfect
couldn't I have underrated? couldn't you have underrated? couldn't he have underrated? couldn't we have underrated? couldn't you have underrated? couldn't they have underrated?	couldn't I have been underrating? couldn't you have been underrating? couldn't he have been underrating? couldn't we have been underrating? couldn't you have been underrating? couldn't they have been underrating?