4 sentences

1. 我明天会加倍努力的。

   wǒ míng​tiān huì jiā​bèi nǔ​lì de.

   I'll work twice as hard tomorrow.

   Source: OpenSubtitles

2. 如果逾期未还，利息将会加倍。

   rú​guǒ yú​qī wèi huán, lì​xī jiāng huì jiā​bèi.

   If it is not repaid on time, the interest will double.

   Source: Dong Chinese Dictionary

3. 他在最后一轮比赛中加倍了赌注。

   tā zài zuì​hòu yī lún bǐ​sài zhōng jiā​bèi le dǔ​zhù.

   He doubled the stakes in the final round of the game.

   Source: Dong Chinese Dictionary

4. 面对挑战，我们需要加倍努力才能成功。

   miàn​duì tiǎo​zhàn, wǒ​men xū​yào jiā​bèi nǔ​lì cái néng chéng​gōng.

   Faced with challenges, we need to double our efforts to succeed.

   Source: Dong Chinese Dictionary