你有必要这么大声跟我说话吗？

Nǐ yǒu bìyào zhème dàshēng gēn wǒ shuōhuà ma?

Is it necessary to speak to me with such a loud voice?

我没必要讨好任何人。

Wǒ méi bìyào tǎohǎo rènhé rén.

I don't need to please anyone.

我们需要采取必要的措施。

wǒmen xūyào cǎiqǔ bìyào de cuòshī.

We need to take necessary measures.