English verb conjugation
TO UNDERPIN

Regular verb: underpin - underpinned - underpinned

Indicative

Present	Present continuous	Preterite	Preterite continuous
don't I underpin? don't you underpin? doesn't he underpin? don't we underpin? don't you underpin? don't they underpin?	am I not underpinning? aren't you underpinning? isn't he underpinning? aren't we underpinning? aren't you underpinning? aren't they underpinning?	didn't I underpin? didn't you underpin? didn't he underpin? didn't we underpin? didn't you underpin? didn't they underpin?	wasn't I underpinning? weren't you underpinning? wasn't he underpinning? weren't we underpinning? weren't you underpinning? weren't they underpinning?
Present perfect	Present perfect continuous	Pluperfect	Pluperfect continuous
haven't I underpinned? haven't you underpinned? hasn't he underpinned? haven't we underpinned? haven't you underpinned? haven't they underpinned?	haven't I been underpinning? haven't you been underpinning? hasn't he been underpinning? haven't we been underpinning? haven't you been underpinning? haven't they been underpinning?	hadn't I underpinned? hadn't you underpinned? hadn't he underpinned? hadn't we underpinned? hadn't you underpinned? hadn't they underpinned?	hadn't I been underpinning? hadn't you been underpinning? hadn't he been underpinning? hadn't we been underpinning? hadn't you been underpinning? hadn't they been underpinning?
Future	Future continuous	Future perfect	Future perfect continuous
won't I underpin? won't you underpin? won't he underpin? won't we underpin? won't you underpin? won't they underpin?	won't I be underpinning? won't you be underpinning? won't he be underpinning? won't we be underpinning? won't you be underpinning? won't they be underpinning?	won't I have underpinned? won't you have underpinned? won't he have underpinned? won't we have underpinned? won't you have underpinned? won't they have underpinned?	won't I have been underpinning? won't you have been underpinning? won't he have been underpinning? won't we have been underpinning? won't you have been underpinning? won't they have been underpinning?

Conditional

Present	Present continuous	Past	Past continuous
wouldn't I underpin? wouldn't you underpin? wouldn't he underpin? wouldn't we underpin? wouldn't you underpin? wouldn't they underpin?	wouldn't I be underpinning? wouldn't you be underpinning? wouldn't he be underpinning? wouldn't we be underpinning? wouldn't you be underpinning? wouldn't they be underpinning?	wouldn't I have underpinned? wouldn't you have underpinned? wouldn't he have underpinned? wouldn't we have underpinned? wouldn't you have underpinned? wouldn't they have underpinned?	wouldn't I have been underpinning? wouldn't you have been underpinning? wouldn't he have been underpinning? wouldn't we have been underpinning? wouldn't you have been underpinning? wouldn't they have been underpinning?

Infinitive

Imperative

Infinitive		Imperative
to underpin		- - -

Participle

Present	Past
underpinning	underpinned