English verb conjugation SHOULD UNDERPIN

Regular verb: underpin - underpinned - underpinned

Affirmation

Simple form

I should underpin
you should underpin
he should underpin
we should underpin
you should underpin
they should underpin

V-ing form

I should be underpinning
you should be underpinning
he should be underpinning
we should be underpinning
you should be underpinning
they should be underpinning

Perfect

I should have underpinned
you should have underpinned
he should have underpinned
we should have underpinned
you should have underpinned
they should have underpinned

V-ing perfect

I should have been underpinning
you should have been underpinning
he should have been underpinning
we should have been underpinning
you should have been underpinning
they should have been underpinning

Negation

Simple form

I should not underpin
you should not underpin
he should not underpin
we should not underpin
you should not underpin
they should not underpin

V-ing form

I should not be underpinning
you should not be underpinning
he should not be underpinning
we should not be underpinning
you should not be underpinning
they should not be underpinning

Perfect

I should not have underpinned
you should not have underpinned
he should not have underpinned
we should not have underpinned
you should not have underpinned
they should not have underpinned

V-ing perfect

I should not have been underpinning
you should not have been underpinning
he should not have been underpinning
we should not have been underpinning
you should not have been underpinning
they should not have been underpinning

Interrogative form

Simple form

should I underpin?
should you underpin?
should he underpin?
should we underpin?
should you underpin?
should they underpin?

V-ing form

should I be underpinning?
should you be underpinning?
should he be underpinning?
should we be underpinning?
should you be underpinning?
should they be underpinning?

Perfect

should I have underpinned?
should you have underpinned?
should he have underpinned?
should we have underpinned?
should you have underpinned?
should they have underpinned?

V-ing perfect

should I have been underpinning?
should you have been underpinning?
should he have been underpinning?
should we have been underpinning?
should you have been underpinning?
should they have been underpinning?

Interro-negative form

Simple form

should I not underpin?
should you not underpin?
should he not underpin?
should we not underpin?
should you not underpin?
should they not underpin?

V-ing form

should I not be underpinning?
should you not be underpinning?
should he not be underpinning?
should we not be underpinning?
should you not be underpinning?
should they not be underpinning?

Perfect

should I not have underpinned?
should you not have underpinned?
should he not have underpinned?
should we not have underpinned?
should you not have underpinned?
should they not have underpinned?

V-ing perfect

should I not have been underpinning?
should you not have been underpinning?
should he not have been underpinning?
should we not have been underpinning?
should you not have been underpinning?
should they not have been underpinning?

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