English verb conjugation
COULD UNDERBID

Irregular verb: underbid - underbid - underbid

Affirmation

Simple form	V-ing form
I could underbid you could underbid he could underbid we could underbid you could underbid they could underbid	I could be underbidding you could be underbidding he could be underbidding we could be underbidding you could be underbidding they could be underbidding
Perfect	V-ing perfect
I could have underbid you could have underbid he could have underbid we could have underbid you could have underbid they could have underbid	I could have been underbidding you could have been underbidding he could have been underbidding we could have been underbidding you could have been underbidding they could have been underbidding

Negation

Simple form	V-ing form
I could not underbid you could not underbid he could not underbid we could not underbid you could not underbid they could not underbid	I could not be underbidding you could not be underbidding he could not be underbidding we could not be underbidding you could not be underbidding they could not be underbidding
Perfect	V-ing perfect
I could not have underbid you could not have underbid he could not have underbid we could not have underbid you could not have underbid they could not have underbid	I could not have been underbidding you could not have been underbidding he could not have been underbidding we could not have been underbidding you could not have been underbidding they could not have been underbidding

Interrogative form

Simple form	V-ing form
could I underbid? could you underbid? could he underbid? could we underbid? could you underbid? could they underbid?	could I be underbidding? could you be underbidding? could he be underbidding? could we be underbidding? could you be underbidding? could they be underbidding?
Perfect	V-ing perfect
could I have underbid? could you have underbid? could he have underbid? could we have underbid? could you have underbid? could they have underbid?	could I have been underbidding? could you have been underbidding? could he have been underbidding? could we have been underbidding? could you have been underbidding? could they have been underbidding?

Interro-negative form

Simple form	V-ing form
could I not underbid? could you not underbid? could he not underbid? could we not underbid? could you not underbid? could they not underbid?	could I not be underbidding? could you not be underbidding? could he not be underbidding? could we not be underbidding? could you not be underbidding? could they not be underbidding?
Perfect	V-ing perfect
could I not have underbid? could you not have underbid? could he not have underbid? could we not have underbid? could you not have underbid? could they not have underbid?	could I not have been underbidding? could you not have been underbidding? could he not have been underbidding? could we not have been underbidding? could you not have been underbidding? could they not have been underbidding?