3 sentences

1. 我会尽全力帮助你的。

   wǒ huì jìn​quán​lì bāng​zhù nǐ de.

   I'll do my best to help you.

   Source: OpenSubtitles

2. 我正在尽全力。

   wǒ zhèng​zài jìn​quán​lì.

   I'm doing the best I can.

   Source: OpenSubtitles

3. 尽全力吧。

   jìn​quán​lì ba.

   Do your best.

   Source: OpenSubtitles