你們在做夢。

You are dreaming.

You're dreaming.

Source: Tatoeba

Sentence Composition

1 你們 nǐmen you (plural)
2 在 zài
  1. to exist; to be alive
  2. (of sb or sth) to be (located) at
  3. (used before a verb to indicate an action in progress)
3 做夢 zuòmèng
  1. to dream
  2. to have a dream
  3. fig. illusion
  4. fantasy
  5. pipe dream