English verb conjugation CAN UNDERPIN

Regular verb: underpin - underpinned - underpinned

Affirmation

Simple form

I can underpin
you can underpin
he can underpin
we can underpin
you can underpin
they can underpin

V-ing form

I can be underpinning
you can be underpinning
he can be underpinning
we can be underpinning
you can be underpinning
they can be underpinning

Perfect

I can have underpinned
you can have underpinned
he can have underpinned
we can have underpinned
you can have underpinned
they can have underpinned

V-ing perfect

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

Negation

Simple form

I can't underpin
you can't underpin
he can't underpin
we can't underpin
you can't underpin
they can't underpin

V-ing form

I can't be underpinning
you can't be underpinning
he can't be underpinning
we can't be underpinning
you can't be underpinning
they can't be underpinning

Perfect

I can't have underpinned
you can't have underpinned
he can't have underpinned
we can't have underpinned
you can't have underpinned
they can't have underpinned

V-ing perfect

I can't have been underpinning
you can't have been underpinning
he can't have been underpinning
we can't have been underpinning
you can't have been underpinning
they can't have been underpinning

Interrogative form

Simple form

can I underpin?
can you underpin?
can he underpin?
can we underpin?
can you underpin?
can they underpin?

V-ing form

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

Perfect

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

V-ing perfect

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

Interro-negative form

Simple form

can't I underpin?
can't you underpin?
can't he underpin?
can't we underpin?
can't you underpin?
can't they underpin?

V-ing form

can't I be underpinning?
can't you be underpinning?
can't he be underpinning?
can't we be underpinning?
can't you be underpinning?
can't they be underpinning?

Perfect

can't I have underpinned?
can't you have underpinned?
can't he have underpinned?
can't we have underpinned?
can't you have underpinned?
can't they have underpinned?

V-ing perfect

can't I have been underpinning?
can't you have been underpinning?
can't he have been underpinning?
can't we have been underpinning?
can't you have been underpinning?
can't they have been underpinning?

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