我们不知道他们乘哪趟列车来。

We didn't know on which train they'd be coming.

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 他们 men they; them
=5 Chéng surname Cheng
=5 chéng
  1. to ride
  2. to mount
  3. to make use of
  4. to avail oneself of
  5. to take advantage of
  6. to multiply (math.)
  7. Buddhist sect or creed
=5 shèng
  1. (archaic) four horse military chariot
  2. (archaic) four
  3. generic term for history books
=5 chéng old variant of chéng
=6
  1. how
  2. which
=6 na (emphatic sentence-final particle, used instead of a after a word ending in "n")
=6
  1. used in 哪吒 zhā
  2. Taiwan pr. nuó
=6 něi which? (interrogative, followed by classifier or numeral-classifier)
=7 tāng old variant of tāng
=7 tāng
  1. to wade
  2. to trample
  3. to turn the soil
=7 tàng
  1. classifier for times, round trips or rows
  2. a time
  3. a trip
=7 zhēng
  1. (ideophonic) jumping; leaping
  2. jumping; leaping
  3. used in 䞴趟 (“jumping; leaping”)
=7 zhèng only used in 䞴趟 (“walking; tottering; staggering”)
=7 chéng only used in 䞴趟 (“escaping in fear”)
8 列车 lièchē (railway) train
9 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)