English verb conjugation
TO UNDERPIN

Regular verb: underpin - underpinned - underpinned

Indicative

Present	Present continuous	Preterite	Preterite continuous
do I underpin? do you underpin? does he underpin? do we underpin? do you underpin? do they underpin?	am I underpinning? are you underpinning? is he underpinning? are we underpinning? are you underpinning? are they underpinning?	did I underpin? did you underpin? did he underpin? did we underpin? did you underpin? did they underpin?	was I underpinning? were you underpinning? was he underpinning? were we underpinning? were you underpinning? were they underpinning?
Present perfect	Present perfect continuous	Pluperfect	Pluperfect continuous
have I underpinned? have you underpinned? has he underpinned? have we underpinned? have you underpinned? have they underpinned?	have I been underpinning? have you been underpinning? has he been underpinning? have we been underpinning? have you been underpinning? have they been underpinning?	had I underpinned? had you underpinned? had he underpinned? had we underpinned? had you underpinned? had they underpinned?	had I been underpinning? had you been underpinning? had he been underpinning? had we been underpinning? had you been underpinning? had they been underpinning?
Future	Future continuous	Future perfect	Future perfect continuous
will I underpin? will you underpin? will he underpin? will we underpin? will you underpin? will they underpin?	will I be underpinning? will you be underpinning? will he be underpinning? will we be underpinning? will you be underpinning? will they be underpinning?	will I have underpinned? will you have underpinned? will he have underpinned? will we have underpinned? will you have underpinned? will they have underpinned?	will I have been underpinning? will you have been underpinning? will he have been underpinning? will we have been underpinning? will you have been underpinning? will they have been underpinning?

Conditional

Present	Present continuous	Past	Past continuous
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?	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?

Infinitive

Imperative

Infinitive		Imperative
to underpin		- - -

Participle

Present	Past
underpinning	underpinned