English verb conjugation COULD TUMBLE

Regular verb: tumble - tumbled - tumbled

Affirmation

Simple form

I could tumble
you could tumble
she could tumble
we could tumble
you could tumble
they could tumble

V-ing form

I could be tumbling
you could be tumbling
she could be tumbling
we could be tumbling
you could be tumbling
they could be tumbling

Perfect

I could have tumbled
you could have tumbled
she 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
she 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
she 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
she 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
she 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
she 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 she tumble?
could we tumble?
could you tumble?
could they tumble?

V-ing form

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

Perfect

could I have tumbled?
could you have tumbled?
could she 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 she 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 she 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 she 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 she 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 she 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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