在我的夢中，我夢到自己在做夢。

In my dream I dreamt that I was dreaming.

Source: Tatoeba

Sentence Composition

1 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)
2 我 wǒ
  1. I
  2. me
  3. my
=3 的 de
  1. of; ~'s (possessive particle)
  2. (used after an attribute when it modifies a noun)
  3. (used at the end of a declarative sentence for emphasis)
  4. (used after a noun, verb or adjective to form a nominal expression, as in 皮革的 pígéde "one made of leather" or 跑堂儿的 pǎotángrde "a waiter (literally, one who runs back and forth in a restaurant)" or 新的 xīnde "new one")
  5. also pr. dì or di in poetry and songs
=3 的 dī a taxi; a cab (abbr. for 的士 dīshì)
=3 的 dí really and truly
=3 的 dì (bound form) bull's-eye; target
4 夢中 mèngzhōng in a dream
5 我 wǒ
  1. I
  2. me
  3. my
6 夢到 mèngdào
  1. to dream of
  2. to dream about
7 自己 zìjǐ
  1. oneself
  2. one's own
8 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)
9 做夢 zuòmèng
  1. to dream
  2. to have a dream
  3. fig. illusion
  4. fantasy
  5. pipe dream