4 sentences

1. 只要坚持下去，成功自会到来。

   zhǐ​yào jiān​chí xià​qù, chéng​gōng zì huì dào​lái.

   As long as you persevere, success will naturally come.

   Source: Dong Chinese Dictionary

2. 就是再困难，我们也要坚持下去。

   jiù​shì zài kùn​nan, wǒ​men yě yào jiān​chí xià​qù.

   Even if it gets even more difficult, we must persevere.

   Source: Dong Chinese Dictionary

3. 只要我们坚持下去，就一定能成功。

   zhǐ​yào wǒ​men jiān​chí xià​qù, jiù yī​dìng néng chéng​gōng.

   As long as we persevere, we will surely succeed.

   Source: Dong Chinese Dictionary

4. 便是他不肯帮忙，我们也得坚持下去。

   biàn​shì tā bù kěn bāng​máng, wǒ​men yě děi jiān​chí xià​qù.

   Even if he refuses to help, we must carry on.

   Source: Dong Chinese Dictionary