2 sentences

1. 你昨晚几时离开的？

   nǐ zuó​wǎn jǐ​shí lí​kāi de?

   What time did you leave last night?

   Source: OpenSubtitles

2. 你几时回来？

   nǐ jǐ​shí huí​lai?

   When will you be back?

   Source: Dong Chinese Dictionary