English verb conjugation COULD TUMBLE

Regular verb: tumble - tumbled - tumbled

Affirmation

Simple form

I could tumble
you could tumble
he could tumble
we could tumble
you could tumble
they could tumble

V-ing form

I could be tumbling
you could be tumbling
he could be tumbling
we could be tumbling
you could be tumbling
they could be tumbling

Perfect

I could have tumbled
you could have tumbled
he could have tumbled
we could have tumbled
you could have tumbled
they could have tumbled

V-ing perfect

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

Negation

Simple form

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

V-ing form

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

Perfect

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

V-ing perfect

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

Interrogative form

Simple form

could I tumble?
could you tumble?
could he tumble?
could we tumble?
could you tumble?
could they tumble?

V-ing form

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

Perfect

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

V-ing perfect

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

Interro-negative form

Simple form

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

V-ing form

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

Perfect

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

V-ing perfect

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

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