我们不知道他来不来。

We do not know if he is coming or not.

Source: Tatoeba

Sentence Composition

1 我们 men we; us; ourselves; our
2 不知 zhī
  1. not to know
  2. unaware
  3. unknowingly
  4. fig. not to admit (defeat, hardships, tiredness etc)
=3 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: ,

=3 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”)
4
  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 and 他人 rén)
5 lái
  1. to come
  2. (used as a substitute for a more specific verb)
  3. hither (directional complement for motion toward the speaker, as in 回来 huílai)
  4. ever since (as in 自古以来 lái)
  5. for the past (amount of time)
  6. (prefix) the coming ...; the next ... (as in 来世 láishì)
  7. (between two verbs) in order to
  8. (after a round number) approximately
  9. (used after to indicate possibility, as in 谈得来 tándelái, or after to indicate impossibility, as in 吃不来 chībulái)
6 不来 lái
  1. (as a complement) be unable to
  2. be unable to
  3. to not come