2 sentences

1. 我会战斗到底。

   wǒ huì zhàn​dòu dào​dǐ.

   I'll fight to the end.

   Source: OpenSubtitles

2. 只有当你别无选择时，你才会战斗。

   zhǐ​yǒu dāng nǐ bié​wú​xuǎn​zé shí, nǐ cái huì zhàn​dòu.

   You only fight when you have no other choice.

   Source: CCMatrix