你想要待多久就待多久。

You can stay as long as you like.

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 想要 xiǎngyào
  1. to want to
  2. to feel like
  3. to fancy
  4. to care for sb
  5. desirous of
=3 待 dāi to stay; to remain
=3 待 dài
  1. to wait
  2. to treat
  3. to deal with
  4. to need
  5. going to (do sth)
  6. about to
  7. intending to
4 多久 duōjiǔ
  1. (of time) how long?
  2. (not) a long time
5 就 jiù
  1. (after a suppositional clause) in that case; then
  2. (after a clause of action) as soon as; immediately after
  3. (same as 就是 jiùshì) merely; nothing else but; simply; just; precisely; exactly
  4. only; as little as
  5. as much as; as many as
  6. to approach; to move towards
  7. to undertake; to engage in
  8. (often followed by 著 zhe) taking advantage of
  9. (of food) to go with
  10. with regard to; concerning
  11. (pattern: 就 jiù ... 也 yě ...) even if ... still ...
  12. (pattern: 不 bù ... 就 jiù ...) if not ... then must be ...
=6 待 dāi to stay; to remain
=6 待 dài
  1. to wait
  2. to treat
  3. to deal with
  4. to need
  5. going to (do sth)
  6. about to
  7. intending to
7 多久 duōjiǔ
  1. (of time) how long?
  2. (not) a long time