那nà天tiān我wǒ们men一yì起qǐ去qù了liǎo公gōng园yuán。

That day we went to the park together.

我wǒ永yǒng远yuǎn不bú会huì忘wàng记jì那nà天tiān。

I will never forget that day.

那nà天tiān下xià雨yǔ了liǎo。

It rained that day.

那nà天tiān下xià了liǎo大dà雨yǔ。

It rained heavily that day.

我wǒ记jì得de那nà天tiān的de事shì。

I remember what happened that day.