Final answer:
The correct way to write 'Je suis chez moi' in the passé composé is 'J'ai été chez moi'.
Step-by-step explanation:
In French, the passé composé is a past tense that is used to talk about completed actions in the past. The passé composé is formed with the auxiliary verb 'avoir' or 'être' conjugated in the present tense, followed by the past participle of the main verb. The correct way to write the sentence 'Je suis chez moi' in the passé composé is 'J'ai été chez moi' because the verb 'aller' (to go) takes the auxiliary verb 'être' in compound tenses.
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