English verb conjugation
COULD OVERVALUE

Regular verb: overvalue - overvalued - overvalued

Affirmation

Simple form	V-ing form
I could overvalue you could overvalue she could overvalue we could overvalue you could overvalue they could overvalue	I could be overvaluing you could be overvaluing she could be overvaluing we could be overvaluing you could be overvaluing they could be overvaluing
Perfect	V-ing perfect
I could have overvalued you could have overvalued she could have overvalued we could have overvalued you could have overvalued they could have overvalued	I could have been overvaluing you could have been overvaluing she could have been overvaluing we could have been overvaluing you could have been overvaluing they could have been overvaluing

Negation

Simple form	V-ing form
I couldn't overvalue you couldn't overvalue she couldn't overvalue we couldn't overvalue you couldn't overvalue they couldn't overvalue	I couldn't be overvaluing you couldn't be overvaluing she couldn't be overvaluing we couldn't be overvaluing you couldn't be overvaluing they couldn't be overvaluing
Perfect	V-ing perfect
I couldn't have overvalued you couldn't have overvalued she couldn't have overvalued we couldn't have overvalued you couldn't have overvalued they couldn't have overvalued	I couldn't have been overvaluing you couldn't have been overvaluing she couldn't have been overvaluing we couldn't have been overvaluing you couldn't have been overvaluing they couldn't have been overvaluing

Interrogative form

Simple form	V-ing form
could I overvalue? could you overvalue? could she overvalue? could we overvalue? could you overvalue? could they overvalue?	could I be overvaluing? could you be overvaluing? could she be overvaluing? could we be overvaluing? could you be overvaluing? could they be overvaluing?
Perfect	V-ing perfect
could I have overvalued? could you have overvalued? could she have overvalued? could we have overvalued? could you have overvalued? could they have overvalued?	could I have been overvaluing? could you have been overvaluing? could she have been overvaluing? could we have been overvaluing? could you have been overvaluing? could they have been overvaluing?

Interro-negative form

Simple form	V-ing form
couldn't I overvalue? couldn't you overvalue? couldn't she overvalue? couldn't we overvalue? couldn't you overvalue? couldn't they overvalue?	couldn't I be overvaluing? couldn't you be overvaluing? couldn't she be overvaluing? couldn't we be overvaluing? couldn't you be overvaluing? couldn't they be overvaluing?
Perfect	V-ing perfect
couldn't I have overvalued? couldn't you have overvalued? couldn't she have overvalued? couldn't we have overvalued? couldn't you have overvalued? couldn't they have overvalued?	couldn't I have been overvaluing? couldn't you have been overvaluing? couldn't she have been overvaluing? couldn't we have been overvaluing? couldn't you have been overvaluing? couldn't they have been overvaluing?