2 sentences

1. 你应该预先做好准备。

   nǐ yīng​gāi yù​xiān zuò hǎo zhǔn​bèi.

   You should make preparations in advance.

   Source: Dong Chinese Dictionary

2. 那是预先准备好的寿材。

   nà shì yù​xiān zhǔn​bèi hǎo de shòu cái.

   That is a coffin prepared in advance.

   Source: Dong Chinese Dictionary