English verb conjugation
WOULD UNDERPIN

Regular verb: underpin - underpinned - underpinned

Affirmation

Simple form	V-ing form
I would underpin you would underpin he would underpin we would underpin you would underpin they would underpin	I would be underpinning you would be underpinning he would be underpinning we would be underpinning you would be underpinning they would be underpinning
Perfect	V-ing perfect
I would have underpinned you would have underpinned he would have underpinned we would have underpinned you would have underpinned they would have underpinned	I would have been underpinning you would have been underpinning he would have been underpinning we would have been underpinning you would have been underpinning they would have been underpinning

Negation

Simple form	V-ing form
I would not underpin you would not underpin he would not underpin we would not underpin you would not underpin they would not underpin	I would not be underpinning you would not be underpinning he would not be underpinning we would not be underpinning you would not be underpinning they would not be underpinning
Perfect	V-ing perfect
I would not have underpinned you would not have underpinned he would not have underpinned we would not have underpinned you would not have underpinned they would not have underpinned	I would not have been underpinning you would not have been underpinning he would not have been underpinning we would not have been underpinning you would not have been underpinning they would not have been underpinning

Interrogative form

Simple form	V-ing form
would I underpin? would you underpin? would he underpin? would we underpin? would you underpin? would they underpin?	would I be underpinning? would you be underpinning? would he be underpinning? would we be underpinning? would you be underpinning? would they be underpinning?
Perfect	V-ing perfect
would I have underpinned? would you have underpinned? would he have underpinned? would we have underpinned? would you have underpinned? would they have underpinned?	would I have been underpinning? would you have been underpinning? would he have been underpinning? would we have been underpinning? would you have been underpinning? would they have been underpinning?

Interro-negative form

Simple form	V-ing form
would I not underpin? would you not underpin? would he not underpin? would we not underpin? would you not underpin? would they not underpin?	would I not be underpinning? would you not be underpinning? would he not be underpinning? would we not be underpinning? would you not be underpinning? would they not be underpinning?
Perfect	V-ing perfect
would I not have underpinned? would you not have underpinned? would he not have underpinned? would we not have underpinned? would you not have underpinned? would they not have underpinned?	would I not have been underpinning? would you not have been underpinning? would he not have been underpinning? would we not have been underpinning? would you not have been underpinning? would they not have been underpinning?