private 中文怎么说？
ex.
1. May I speak to you in private?

2. Somethings are better kept private.

3. This is a private room for VIP customers.

4. Please do not touch my private parts. (Private parts=sexual body parts)

5. I need some privacy so I can think.

P.S How do I say "Many different ways of using the word "privacy" in a sentence."
(I tried to ask that in mandarin but didn't know how. :p)

Question

private 中文怎么说？
ex.
1. May I speak to you in private?

2. Somethings are better kept private.

3. This is a private room for VIP customers.

4. Please do not touch my private parts. (Private parts=sexual body parts)

5. I need some privacy so I can think.

P.S How do I say "Many different ways of using the word "privacy" in a sentence." 
(I tried to ask that in mandarin but didn't know how. :p)

Answer

“Private” is a adj. word , it mainly means that ”私人的、个人的=personal、私密的、隐私的=secret”。You could see the explanations below:

1 1. May I speak to you in private? 我可以和你单独/私下交谈吗？
2. Somethings are better kept private.有些事情最好保持私密性=有些事情最好保密。
3. This is a private room for VIP customers. 这是一间为贵宾（准备）的私人空间。
4. Please do not touch my private parts. (Private parts=sexual body parts)
请不要碰触我的私密部位。
5. I need some privacy so I can think.我需要一些私人空间，（我）才能思考。

How do I say "Many different ways of using the word "privacy" in a sentence." 
在一句话中（in a sentence），有许多种不同的方式（many different ways）来使用“隐私”这个词（using the word “privacy”）。

Answer

Private generally means “私人的，私密的”。
Chinese translations of the sentences:
1.我能私下里和你谈一下吗？（咱们能单独谈谈吗？）
2.有些事还是保密的好。
3.这是贵宾的私人专属房间。
4.请不要碰我的私密部位。
5.我需要思考，所以请给我点私人空间。

"Many different ways of using the word "privacy" in a sentence." means “"privacy"这个词在句中的很多不同用法。”