出门前记得带伞，以免淋雨。

Chūmén qián jìde dài sǎn, yǐmiǎn línyǔ.

Remember to take an umbrella before going out so you don’t get caught in the rain.

医生提醒他要按时吃药，以免病情恶化。

Yīshēng tíxǐng tā yào ànshí chīyào, yǐmiǎn bìngqíng èhuà.

The doctor reminded him to take his medicine on time to prevent his condition from getting worse.

我们应该早点出发，以免遇到早高峰堵车。

Wǒmen yīnggāi zǎodiǎn chūfā, yǐmiǎn yùdào zǎogāofēng dǔchē.

We should set off earlier so we don’t get stuck in the morning rush hour traffic.