General past tense:
* Je suis parti(e). (I left.) This is the most common and versatile way to say it. It works for both men and women.
* Je me suis en allé(e). (I went away.) This is another option for general past tense.
Past tense with specific time:
* Je suis parti(e) hier. (I left yesterday.)
* Je suis parti(e) il y a deux heures. (I left two hours ago.)
Other options:
* Je suis parti(e) de la maison. (I left the house.)
* Je suis parti(e) pour le travail. (I left for work.)
The best option will depend on the specific situation and the context.