先前说好的计划怎么突然改了？

Xiānqián shuō hǎo de jìhuà zěnme tūrán gǎi le?

How did the plan we agreed on earlier suddenly change?

和先前相比，他现在自信多了。

Hé xiānqián xiāngbǐ, tā xiànzài zìxìn duō le.

Compared with before, he is much more confident now.

先前发生的事，我们就不要再提了。

Xiānqián fāshēng de shì, wǒmen jiù búyào zài tí le.

Let’s not bring up what happened before anymore.