他生病了，今天不能来上课。

Tā shēngbìng le, jīntiān bù néng lái shàngkè.

He is sick and cannot come to class today.

你哪儿不舒服，是不是病了？

Nǐ nǎr bù shūfu, shìbúshì bìng le?

Where do you feel uncomfortable, are you sick?

如果你觉得不舒服，就应该去医院看病。

Rúguǒ nǐ juéde bù shūfu, jiù yīnggāi qù yīyuàn kànbìng.

If you feel unwell, you should go to the hospital to see a doctor.