4 sentences for 上课 (shàng​kè — teach class)

1. 她是接替我上课的人。

   tā shì jiē​tì wǒ shàng​kè de rén.

   She's the one taking over my classes for me.

   Source: OpenSubtitles

2. 王老师正在教室里给学生们上课。

   Wáng lǎo​shī zhèng​zài jiào​shì lǐ gěi xué​sheng men shàng​kè.

   Teacher Wang is teaching a class in the classroom.

   Source: Dong Chinese Dictionary

3. 武先生今天有点不舒服，没来给我们上课。

   Wǔ xiān​sheng jīn​tiān yǒu​diǎn bù shū​fu, méi lái gěi wǒ​men shàng​kè.

   Mr. Wu is feeling a bit unwell today and didn't come to teach us.

   Source: Dong Chinese Dictionary

4. 上课时她是我们的老师，下课以后是我们的朋友，而且是很好的朋友。

   shàng​kè shí tā shì wǒ​men de lǎo​shī, xià​kè yǐ​hòu shì wǒ​men de péng​you, ér​qiě shì hěn hǎo de péng​you.

   In class she's our teacher; after class she's our friend, and a good friend too.

   Source: Tatoeba