English verb conjugation
TO UNDERPIN

Regular verb: underpin - underpinned - underpinned

Indicative

Present	Present continuous	Preterite	Preterite continuous
do I not underpin? do you not underpin? does he not underpin? do we not underpin? do you not underpin? do they not underpin?	am I not underpinning? are you not underpinning? is he not underpinning? are we not underpinning? are you not underpinning? are they not underpinning?	did I not underpin? did you not underpin? did he not underpin? did we not underpin? did you not underpin? did they not underpin?	was I not underpinning? were you not underpinning? was he not underpinning? were we not underpinning? were you not underpinning? were they not underpinning?
Present perfect	Present perfect continuous	Pluperfect	Pluperfect continuous
have I not underpinned? have you not underpinned? has he not underpinned? have we not underpinned? have you not underpinned? have they not underpinned?	have I not been underpinning? have you not been underpinning? has he not been underpinning? have we not been underpinning? have you not been underpinning? have they not been underpinning?	had I not underpinned? had you not underpinned? had he not underpinned? had we not underpinned? had you not underpinned? had they not underpinned?	had I not been underpinning? had you not been underpinning? had he not been underpinning? had we not been underpinning? had you not been underpinning? had they not been underpinning?
Future	Future continuous	Future perfect	Future perfect continuous
will I not underpin? will you not underpin? will he not underpin? will we not underpin? will you not underpin? will they not underpin?	will I not be underpinning? will you not be underpinning? will he not be underpinning? will we not be underpinning? will you not be underpinning? will they not be underpinning?	will I not have underpinned? will you not have underpinned? will he not have underpinned? will we not have underpinned? will you not have underpinned? will they not have underpinned?	will I not have been underpinning? will you not have been underpinning? will he not have been underpinning? will we not have been underpinning? will you not have been underpinning? will they not have been underpinning?

Conditional

Present	Present continuous	Past	Past continuous
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?	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?

Infinitive

Imperative

Infinitive		Imperative
to underpin		- - -

Participle

Present	Past
underpinning	underpinned