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 cannot underpin
you cannot underpin
he cannot underpin
we cannot underpin
you cannot underpin
they cannot underpin

V-ing form

I cannot be underpinning
you cannot be underpinning
he cannot be underpinning
we cannot be underpinning
you cannot be underpinning
they cannot be underpinning

Perfect

I cannot have underpinned
you cannot have underpinned
he cannot have underpinned
we cannot have underpinned
you cannot have underpinned
they cannot have underpinned

V-ing perfect

I cannot have been underpinning
you cannot have been underpinning
he cannot have been underpinning
we cannot have been underpinning
you cannot have been underpinning
they cannot 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 I not underpin?
can you not underpin?
can he not underpin?
can we not underpin?
can you not underpin?
can they not underpin?

V-ing form

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

Perfect

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

V-ing perfect

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

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