3 sentences

1. 我在这里待到10点。

   wǒ zài zhè​lǐ dāi dào shí​diǎn.

   I'll stay here until ten.

   Source: Tatoeba

2. 你必须在10点前回来。

   nǐ bì​xū zài shí​diǎn qián huí​lai.

   You must be back by 10 o'clock.

   Source: Tatoeba

3. 没事，我10点前会回来的。

   méi shì, wǒ shí​diǎn qián huì huí​lai de.

   It's ok, I'll be back by 10.

   Source: OpenSubtitles