你说如果那天是雨天你说如果那天是晴
[nĭ shuō rú guŏ nèi tiān shì yŭ tiān nĭ shuō rú guŏ nèi tiān shì qíng]
A hypothetical discussion starting with 'What if...', specifically talking about what might happen on a rainy day or sunny day. Implies contemplation or reminiscence about different scenarios of a certain day.