English verb conjugation COULD GRIN

Regular verb: grin - grinned - grinned

Affirmation

Simple form

I could grin
you could grin
he could grin
we could grin
you could grin
they could grin

V-ing form

I could be grinning
you could be grinning
he could be grinning
we could be grinning
you could be grinning
they could be grinning

Perfect

I could have grinned
you could have grinned
he could have grinned
we could have grinned
you could have grinned
they could have grinned

V-ing perfect

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

Negation

Simple form

I could not grin
you could not grin
he could not grin
we could not grin
you could not grin
they could not grin

V-ing form

I could not be grinning
you could not be grinning
he could not be grinning
we could not be grinning
you could not be grinning
they could not be grinning

Perfect

I could not have grinned
you could not have grinned
he could not have grinned
we could not have grinned
you could not have grinned
they could not have grinned

V-ing perfect

I could not have been grinning
you could not have been grinning
he could not have been grinning
we could not have been grinning
you could not have been grinning
they could not have been grinning

Interrogative form

Simple form

could I grin?
could you grin?
could he grin?
could we grin?
could you grin?
could they grin?

V-ing form

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

Perfect

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

V-ing perfect

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

Interro-negative form

Simple form

could I not grin?
could you not grin?
could he not grin?
could we not grin?
could you not grin?
could they not grin?

V-ing form

could I not be grinning?
could you not be grinning?
could he not be grinning?
could we not be grinning?
could you not be grinning?
could they not be grinning?

Perfect

could I not have grinned?
could you not have grinned?
could he not have grinned?
could we not have grinned?
could you not have grinned?
could they not have grinned?

V-ing perfect

could I not have been grinning?
could you not have been grinning?
could he not have been grinning?
could we not have been grinning?
could you not have been grinning?
could they not have been grinning?

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