如果你需要任何東西，讓我知道。

If you need anything, let me know.

Source: Tatoeba

Sentence Composition

1 如果 rúguǒ
  1. if
  2. in case
  3. in the event that
=2 你 nǐ you (informal, as opposed to courteous 您 nín)
=2 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.)
3 需要 xūyào
  1. to need; to want; to demand; to require
  2. needs
4 任何 rènhé any; whatever; whichever
=5 東西 dōngxī east and west
=5 東西 dōngxi
  1. thing
  2. stuff
  3. person

classifiers: 個, 件
6 讓 ràng
  1. to yield
  2. to permit
  3. to let sb do sth
  4. to have sb do sth
  5. to make sb (feel sad etc)
  6. by (indicates the agent in a passive clause, like 被 bèi)
7 我 wǒ
  1. I
  2. me
  3. my
8 知道 zhīdào
  1. to know; to become aware of
  2. also pr. zhīdao