你要在他們回來之前把功課做完。

Finish your homework by the time they return.

Source: Tatoeba

Sentence Composition

=1 你 nǐ you (informal, as opposed to courteous 您 nín)
=1 你 nǐ you (Note: In Taiwan, 妳 is used to address females, but in mainland China, it is not commonly used. Instead, 你 is used to address both males and females.)
=2 要 yāo (bound form) to demand; to coerce
=2 要 yào
  1. to want; to need; to ask for
  2. will; shall; about to
  3. need to; should
  4. if (same as 要是 yàoshi)
  5. (bound form) important
=2 要 yǎo
  1. (archaic) alternative form of 偠 (yǎo)
  2. alternative form of 偠 (yǎo)
  3. used in 要褭／要袅
3 在 zài
  1. to exist; to be alive
  2. (of sb or sth) to be (located) at
  3. (used before a verb to indicate an action in progress)
4 他們 tāmen they; them
=5 回來 huílai to return; to come back
=5 回來 huílái
  1. (to come or bring) back (used after a verb to indicate direction towards the speaker)
  2. back (used after a verb to indicate direction towards the speaker)
  3. to return; to come back; to be back
6 之前 zhīqián
  1. before
  2. prior to
  3. ago
  4. previously
  5. beforehand
=7 把 bǎ
  1. to hold; to grasp
  2. to hold a baby in position to help it urinate or defecate
  3. handlebar
  4. classifier: handful, bundle, bunch
  5. classifier for things with handles
  6. (used to put the object before the verb: 把 bǎ + {noun} + {verb})
=7 把 bà handle
=7 把 pá
  1. (obsolete on its own in Standard Chinese) alternative form of 爬 (pá, “to scratch”)
  2. a surname
  3. alternative form of 爬 (pá, “to scratch”)
8 功課 gōngkè
  1. homework
  2. assignment
  3. task
  4. classwork
  5. lesson
  6. study

classifier: 門
9 做完 zuòwán
  1. to finish
  2. to complete the task