不知何时春暖花开， 今天早晨还下雪了。

I don't know when spring will come and when the flowers will bloom. It was still snowing this morning.

Source: Tatoeba

Sentence Composition

1 不知 bùzhī
  1. not to know
  2. unaware
  3. unknowingly
  4. fig. not to admit (defeat, hardships, tiredness etc)
2 何时 héshí when
3 春暖花开 chūnnuǎnhuākāi during the warmth of spring all the flowers bloom
4 今天 jīntiān
  1. today
  2. the present time; now
=5 早晨 zǎochén
  1. early morning
  2. also pr. zǎochen

classifier: 個
=5 早晨 zǎochen early morning (usually referring to the period from sunrise or 4 am to 8 am or 9 am)
=6 还 Huán surname Huan
=6 还 hái
  1. still
  2. still in progress
  3. still more
  4. yet
  5. even more
  6. in addition
  7. fairly
  8. passably (good)
  9. as early as
  10. even
  11. also
  12. else
=6 还 huán
  1. to pay back
  2. to return
7 下雪 xiàxuě to snow
=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