Conjugación del verbo inglés
COULD TUMBLE

Verbo regular: tumble - tumbled - tumbled

Afirmación

Forma simple	Forma con V-ing
I could tumble you could tumble she could tumble we could tumble you could tumble they could tumble	I could be tumbling you could be tumbling she could be tumbling we could be tumbling you could be tumbling they could be tumbling
Perfecto	Perfecto con V-ing
I could have tumbled you could have tumbled she could have tumbled we could have tumbled you could have tumbled they could have tumbled	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

Negación

Forma simple	Forma con V-ing
I could not tumble you could not tumble she could not tumble we could not tumble you could not tumble they could not tumble	I could not be tumbling you could not be tumbling she could not be tumbling we could not be tumbling you could not be tumbling they could not be tumbling
Perfecto	Perfecto con V-ing
I could not have tumbled you could not have tumbled she could not have tumbled we could not have tumbled you could not have tumbled they could not have tumbled	I could not have been tumbling you could not have been tumbling she could not have been tumbling we could not have been tumbling you could not have been tumbling they could not have been tumbling

Forma interrogativa

Forma simple	Forma con V-ing
could I tumble? could you tumble? could she tumble? could we tumble? could you tumble? could they tumble?	could I be tumbling? could you be tumbling? could she be tumbling? could we be tumbling? could you be tumbling? could they be tumbling?
Perfecto	Perfecto con V-ing
could I have tumbled? could you have tumbled? could she have tumbled? could we have tumbled? could you have tumbled? could they have tumbled?	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?

Forma interro-negativa

Forma simple	Forma con V-ing
could I not tumble? could you not tumble? could she not tumble? could we not tumble? could you not tumble? could they not tumble?	could I not be tumbling? could you not be tumbling? could she not be tumbling? could we not be tumbling? could you not be tumbling? could they not be tumbling?
Perfecto	Perfecto con V-ing
could I not have tumbled? could you not have tumbled? could she not have tumbled? could we not have tumbled? could you not have tumbled? could they not have tumbled?	could I not have been tumbling? could you not have been tumbling? could she not have been tumbling? could we not have been tumbling? could you not have been tumbling? could they not have been tumbling?