Conjugation of the verb underpin

Indicative
Present
Iunderpin
youunderpin
he/she/itunderpins
weunderpin
youunderpin
theyunderpin
Present Progressive
Iam underpinning
youare underpinning
he/she/itis underpinning
weare underpinning
youare underpinning
theyare underpinning
Past
Iunderpinned
youunderpinned
he/she/itunderpinned
weunderpinned
youunderpinned
theyunderpinned
Past Progressive
Iwas underpinning
youwere underpinning
he/she/itwas underpinning
wewere underpinning
youwere underpinning
theywere underpinning
Perfect
Ihave underpinned
youhave underpinned
he/she/ithas underpinned
wehave underpinned
youhave underpinned
theyhave underpinned
Perfect Progressive
Ihave been underpinning
youhave been underpinning
he/she/ithas been underpinning
wehave been underpinning
youhave been underpinning
theyhave been underpinning
Pluperfect I
Ihad underpinned
youhad underpinned
he/she/ithad underpinned
wehad underpinned
youhad underpinned
theyhad underpinned
Pluperfect II
Ihad underpinned
youhad underpinned
he/she/ithad underpinned
wehad underpinned
youhad underpinned
theyhad underpinned
Future I
Iwill underpin
youwill underpin
he/she/itwill underpin
wewill underpin
youwill underpin
theywill underpin
Future II
Iam going to underpin
youare going to underpin
he/she/itis going to underpin
weare going to underpin
youare going to underpin
theyare going to underpin
Future Progressive
Iwill be underpinning
youwill be underpinning
he/she/itwill be underpinning
wewill be underpinning
youwill be underpinning
theywill be underpinning
Future Perfect
Iwill have underpinned
youwill have underpinned
he/she/itwill have underpinned
wewill have underpinned
youwill have underpinned
theywill have underpinned
Conditional
Present
Iwould underpin
youwould underpin
he/she/itwould underpin
wewould underpin
youwould underpin
theywould underpin
Progressive
Iwould be underpinning
youwould be underpinning
he/she/itwould be underpinning
wewould be underpinning
youwould be underpinning
theywould be underpinning
Past Progressive
Iwould have been underpinning
youwould have been underpinning
he/she/itwould have been underpinning
wewould have been underpinning
youwould have been underpinning
theywould have been underpinning
Subjunctive
Present
Iunderpin
youunderpin
he/she/itunderpins
weunderpin
youunderpin
theyunderpin
Present Perfect
Ihave underpinned
youhave underpinned
he/she/ithas underpinned
wehave underpinned
youhave underpinned
theyhave underpinned
Past
Iunderpinned
youunderpinned
he/she/itunderpinned
weunderpinned
youunderpinned
theyunderpinned
Pluperfect I
Ihad underpinned
youhad underpinned
he/she/ithad underpinned
wehad underpinned
youhad underpinned
theyhad underpinned
Past
Iunderpinned
youunderpinned
he/she/itunderpinned
weunderpinned
youunderpinned
theyunderpinned
Pluperfect II
Ihad underpinned
youhad underpinned
he/she/ithad underpinned
wehad underpinned
youhad underpinned
theyhad underpinned
Imperative
Imperative
youunderpin
he/she/itunderpin
welet us underpin
youunderpin
theyunderpin
Negative Imperative
youdo not underpin
he/she/itdo not underpin
welet us not underpin
youdo not underpin
theydo not underpin