他们已经四十八个小时沒睡觉了。

They haven't slept for forty-eight hours.

Source: Tatoeba

Sentence Composition

1 他们 tāmen they; them
=2 已经 yǐjīng already
=2 已经 yǐjìng already
3 四十八 sìshíbā forty-eight; 48
=4 个 gě used in 自个儿 zìgěr
=4 个 gè
  1. (classifier used before a noun that has no specific classifier)
  2. (bound form) individual
=4 个 gè variant of 个 gè
5 小时 xiǎoshí hour

classifier: 個
=6 沒 méi (negative prefix for verbs) have not; not
=6 沒 mò
  1. drowned
  2. to end
  3. to die
  4. to inundate
=7 睡觉 shuìjiào
  1. to go to bed
  2. to sleep
=7 睡觉 shuìjué
  1. (archaic, intransitive) to wake up
  2. to wake up
=8 了 le
  1. (completed action marker)
  2. (modal particle indicating change of state, situation now)
  3. (modal particle intensifying preceding clause)
=8 了 liǎo
  1. to finish
  2. (used with 得 dé or 不 bù after a verb to express (im)possibility, as in 忘不了 wàngbuliǎo "cannot forget")
  3. (literary) (usually followed by a negative such as 无 wú or 不 bù) completely (not); entirely (not); (not) in the least
  4. to understand clearly (variant of 了 liǎo)
=8 了 liǎo
  1. (of eyes) bright
  2. clear-sighted
  3. to understand clearly
=8 了 liào unofficial variant of 瞭 liào