不知道为什么我一开始学习就会犯困。

For some reason, I feel sleepy when I start studying.

Source: Tatoeba

Sentence Composition

1 不知 zhī
  1. not to know
  2. unaware
  3. unknowingly
  4. fig. not to admit (defeat, hardships, tiredness etc)
=2 dào
  1. (bound form) way; reason; principle
  2. (bound form) a skill; an art; a specialization
  3. (Daoism) the Way; the Dao
  4. to say (introducing a direct quotation, as in a novel)
  5. (bound form) to express; to extend (polite words)
  6. classifier for long thin things (rivers, cracks, shadows etc), barriers (walls, doors etc), questions (in an exam etc), commands, courses in a meal, steps in a process
  7. (old) circuit (administrative division)

classifiers: ,

=2 dǎo
  1. (obsolete on its own in Standard Chinese) alternative form of / (dǎo, “to direct; to guide; to lead; to conduct”)
  2. alternative form of / (dǎo, “to direct; to guide; to lead; to conduct”)
3 为什么 wèishénme
  1. why?
  2. for what reason?
4
  1. I
  2. me
  3. my
5 一开始 kāishǐ initially; originally; at first; in the beginning
6 学习 xué
  1. to learn
  2. to study
7 jiù
  1. (after a suppositional clause) in that case; then
  2. (after a clause of action) as soon as; immediately after
  3. (same as 就是 jiùshì) merely; nothing else but; simply; just; precisely; exactly
  4. only; as little as
  5. as much as; as many as
  6. to approach; to move towards
  7. to undertake; to engage in
  8. (often followed by zhe) taking advantage of
  9. (of food) to go with
  10. with regard to; concerning
  11. (pattern: jiù ... ...) even if ... still ...
  12. (pattern: ... jiù ...) if not ... then must be ...
=8 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)
=8 kuài (bound form) to reckon accounts
9 犯困 fànkùn (coll.) to get sleepy