你不該大聲說話。

You must not speak loudly.

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 不該 bùgāi
  1. should not
  2. to owe nothing
3 大聲 dàshēng
  1. loud voice
  2. in a loud voice
  3. loudly
4 說話 shuōhuà
  1. to speak
  2. to say
  3. to talk
  4. to gossip
  5. to tell stories
  6. talk
  7. word