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 couldn't grin
you couldn't grin
he couldn't grin
we couldn't grin
you couldn't grin
they couldn't grin

V-ing form

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

Perfect

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

V-ing perfect

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

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

V-ing form

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

Perfect

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

V-ing perfect

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

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