我不知道湯姆在睡覺。

I wasn't aware that Tom was sleeping.

Source: Tatoeba

Sentence Composition

1 我不知道 wǒbùzhīdào I don't know.
2 湯姆 Tāngmǔ Tom (name)
3 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)
=4 睡覺 shuìjiào
  1. to go to bed
  2. to sleep
=4 睡覺 shuìjué
  1. (archaic, intransitive) to wake up
  2. to wake up