English verb conjugation
COULD UNDERBID

Irregular verb: underbid - underbid - underbid

Affirmation

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