万一⋯⋯，（就）⋯⋯ Grammar Structure

The structure "万一⋯⋯，（就）⋯⋯" is used in Chinese to express a hypothetical situation and its potential consequence. "万一" translates to "in case" or "if by any chance," indicating a scenario that is unlikely but possible. The phrase that follows "万一" presents the hypothetical condition, while the clause after the comma (often starting with "就") describes the result or action that should be taken if that condition occurs.

For example:

• 万一我没来，你就自己先去吧。 (In case I don't come, you should go by yourself first.)
• 一定要把你们的护照带上，万一需要，没带就麻烦了。 (Make sure to bring your passports; in case you need them, it would be troublesome if you don't have them.)

In these sentences, "万一" sets up a condition that may or may not happen, and the following clause provides guidance on what to do if that condition is met. This structure is useful for discussing precautions or planning for unexpected events.