如果你要改变主意，通知我。

Should you change your mind, 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 要 yāo (bound form) to demand; to coerce
=3 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
=3 要 yǎo
  1. (archaic) alternative form of 偠 (yǎo)
  2. alternative form of 偠 (yǎo)
  3. used in 要褭／要袅
4 改变 gǎibiàn
  1. to change
  2. to alter
  3. to transform
=5 主意 zhǔyi
  1. plan
  2. idea
  3. decision
  4. Beijing pr. zhúyi

classifier: 個
=5 主意 zhǔyì
  1. (Puxian Min) to maintain a position; to advocate; to stand for something
  2. idea; plan
  3. means; method; way
  4. personal judgement; opinion; decision
  5. to maintain a position; to advocate; to stand for something
6 通知 tōngzhī
  1. to notify
  2. to inform
  3. notice
  4. notification

classifier: 個
7 我 wǒ
  1. I
  2. me
  3. my