と同時に

と同時に is used to show two events or actions happen at exactly the same moment. The first clause describes one action, and the second describes another action that occurs concurrently. It often implies a close timing relationship and can carry a sense of immediacy or inevitability. In Japanese, the main subject can be the same for both actions or inferred from context. For verbs, use the dictionary form (present/future) or past form before と同時に; with nouns you attach と同時に directly. In translation, choose 'at the same time as', 'the moment', or 'as soon as' depending on the nuance and timing.