To support from below with props or masonry.
Infinitiveunderpin
Past simpleunderpinned
Past participleunderpinned
-ing formunderpinning
Full conjugation of the English verb to underpin (past simple underpinned,
past participle underpinned):
present simple and continuous, past simple and continuous, present perfect, past perfect,
future, conditional, subjunctive and imperative, with all persons.
Indicative
Present simple
I
underpin
you
underpin
he/she/it
underpins
we
underpin
you
underpin
they
underpin
Present continuous
I
am underpinning
you
are underpinning
he/she/it
is underpinning
we
are underpinning
you
are underpinning
they
are underpinning
Present perfect
I
have underpinned
you
have underpinned
he/she/it
has underpinned
we
have underpinned
you
have underpinned
they
have underpinned
Present perfect continuous
I
have been underpinning
you
have been underpinning
he/she/it
has been underpinning
we
have been underpinning
you
have been underpinning
they
have been underpinning
Past simple
I
underpinned
you
underpinned
he/she/it
underpinned
we
underpinned
you
underpinned
they
underpinned
Past continuous
I
was underpinning
you
were underpinning
he/she/it
was underpinning
we
were underpinning
you
were underpinning
they
were underpinning
Past perfect
I
had underpinned
you
had underpinned
he/she/it
had underpinned
we
had underpinned
you
had underpinned
they
had underpinned
Past perfect continuous
I
had been underpinning
you
had been underpinning
he/she/it
had been underpinning
we
had been underpinning
you
had been underpinning
they
had been underpinning
Future simple
I
will underpin
you
will underpin
he/she/it
will underpin
we
will underpin
you
will underpin
they
will underpin
Future continuous
I
will be underpinning
you
will be underpinning
he/she/it
will be underpinning
we
will be underpinning
you
will be underpinning
they
will be underpinning
Future perfect
I
will have underpinned
you
will have underpinned
he/she/it
will have underpinned
we
will have underpinned
you
will have underpinned
they
will have underpinned
Future perfect continuous
I
will have been underpinning
you
will have been underpinning
he/she/it
will have been underpinning
we
will have been underpinning
you
will have been underpinning
they
will have been underpinning
Conditional
Present
I
would underpin
you
would underpin
he/she/it
would underpin
we
would underpin
you
would underpin
they
would underpin
Present continuous
I
would be underpinning
you
would be underpinning
he/she/it
would be underpinning
we
would be underpinning
you
would be underpinning
they
would be underpinning
Perfect
I
would have underpinned
you
would have underpinned
he/she/it
would have underpinned
we
would have underpinned
you
would have underpinned
they
would have underpinned
Perfect continuous
I
would have been underpinning
you
would have been underpinning
he/she/it
would have been underpinning
we
would have been underpinning
you
would have been underpinning
they
would have been underpinning
Subjunctive
Present
that I
underpin
that you
underpin
that he/she/it
underpin
that we
underpin
that you
underpin
that they
underpin
Past
if I
underpinned
if you
underpinned
if he/she/it
underpinned
if we
underpinned
if you
underpinned
if they
underpinned
Imperative
Affirmative
you
underpin
we
let's underpin
Negative
you
don't underpin
we
let's not underpin
Non-finite forms
Infinitive
to underpin
Perfect infinitive
to have underpinned
Present participle / gerund
underpinning
Past participle
underpinned
Conjugations: Wiktionary (via kaikki.org), adapted, licensed under CC BY-SA 4.0.