我感觉自己好像发烧了。

Wǒ gǎnjué zìjǐ hǎoxiàng fāshāo le.

I feel like I have a fever.

他发烧了！

Tā fāshāo le!

He has a fever!

你发烧一定要去看医生。

Nǐ fāshāo yídìng yào qù kàn yīshēng.

You must see a doctor if you have a fever.