English verb conjugation COULD STAMP

Regular verb: stamp - stamped - stamped

Affirmation

Simple form

I could stamp
you could stamp
he could stamp
we could stamp
you could stamp
they could stamp

V-ing form

I could be stamping
you could be stamping
he could be stamping
we could be stamping
you could be stamping
they could be stamping

Perfect

I could have stamped
you could have stamped
he could have stamped
we could have stamped
you could have stamped
they could have stamped

V-ing perfect

I could have been stamping
you could have been stamping
he could have been stamping
we could have been stamping
you could have been stamping
they could have been stamping

Negation

Simple form

I couldn't stamp
you couldn't stamp
he couldn't stamp
we couldn't stamp
you couldn't stamp
they couldn't stamp

V-ing form

I couldn't be stamping
you couldn't be stamping
he couldn't be stamping
we couldn't be stamping
you couldn't be stamping
they couldn't be stamping

Perfect

I couldn't have stamped
you couldn't have stamped
he couldn't have stamped
we couldn't have stamped
you couldn't have stamped
they couldn't have stamped

V-ing perfect

I couldn't have been stamping
you couldn't have been stamping
he couldn't have been stamping
we couldn't have been stamping
you couldn't have been stamping
they couldn't have been stamping

Interrogative form

Simple form

could I stamp?
could you stamp?
could he stamp?
could we stamp?
could you stamp?
could they stamp?

V-ing form

could I be stamping?
could you be stamping?
could he be stamping?
could we be stamping?
could you be stamping?
could they be stamping?

Perfect

could I have stamped?
could you have stamped?
could he have stamped?
could we have stamped?
could you have stamped?
could they have stamped?

V-ing perfect

could I have been stamping?
could you have been stamping?
could he have been stamping?
could we have been stamping?
could you have been stamping?
could they have been stamping?

Interro-negative form

Simple form

couldn't I stamp?
couldn't you stamp?
couldn't he stamp?
couldn't we stamp?
couldn't you stamp?
couldn't they stamp?

V-ing form

couldn't I be stamping?
couldn't you be stamping?
couldn't he be stamping?
couldn't we be stamping?
couldn't you be stamping?
couldn't they be stamping?

Perfect

couldn't I have stamped?
couldn't you have stamped?
couldn't he have stamped?
couldn't we have stamped?
couldn't you have stamped?
couldn't they have stamped?

V-ing perfect

couldn't I have been stamping?
couldn't you have been stamping?
couldn't he have been stamping?
couldn't we have been stamping?
couldn't you have been stamping?
couldn't they have been stamping?

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