我完全不明白他為甚麼會突然辭職。

I don't know at all why he quit his job suddenly.

I haven't got a clue as to why he quit so suddenly.

Source: Tatoeba

Sentence Composition

1 我 wǒ
  1. I
  2. me
  3. my
2 完全 wánquán
  1. complete; whole
  2. totally; entirely
3 不明 bùmíng
  1. not clear
  2. unknown
  3. to fail to understand
=4 白 Bái surname Bai
=4 白 bái
  1. white
  2. snowy
  3. pure
  4. bright
  5. empty
  6. blank
  7. plain
  8. clear
  9. to make clear
  10. in vain
  11. gratuitous
  12. free of charge
  13. reactionary
  14. anti-communist
  15. funeral
  16. to stare coldly
  17. to write wrong character
  18. to state
  19. to explain
  20. vernacular
  21. spoken lines in opera
5 他 tā
  1. (third-person singular) (since the early 20th century, usu. male) he; him; his
  2. (bound form) other; another; some other (as in 他日 tārì and 他人 tārén)
=6 為 wéi
  1. as (in the capacity of)
  2. to take sth as
  3. to act as
  4. to serve as
  5. to behave as
  6. to become
  7. to be
  8. to do
  9. by (in the passive voice)
=6 為 wèi
  1. because of
  2. for
  3. to
=7 甚 shén variant of 什 shén
=7 甚 shèn
  1. excessive; undue
  2. to exceed; to be more than
  3. very; extremely
  4. (dialect) what; whatever (Taiwan pr. shén)
=8 麼 má exclamatory final particle
=8 麼 ma interrogative final particle
=8 麼 me suffix, used to form interrogative 什么 shénme, what?, indefinite 这么 zhème thus, etc
=8 麼 mó
  1. tiny
  2. insignificant
=9 會 huì
  1. can; to have the skill; to know how to
  2. to be likely to; to be sure to
  3. to meet; to get together
  4. meeting; gathering
  5. (suffix) union; group; association
  6. (bound form) a moment (Taiwan pr. huǐ)
=9 會 kuài (bound form) to reckon accounts
=9 會 kuò only used in 會撮／会撮
10 突然 tūrán sudden; abrupt; unexpected
11 辭職 cízhí to resign