Usage note
上课是指去学校参加课程。
shàng kè shì zhǐ qù xué xiào cān jiā kē chǎn.
上课 means attending classes at school.
Context note
上课通常在早上或下午，是学生学习知识的时间。
shàng kè tōng cháng zài zǎo shang huò xià wǔ, shì xué shēng xué xí zhī shi de shí jiān.
Classes usually happen in the morning or afternoon, when students learn knowledge.
5 examples
妈妈叫我上课。
mā ma jiào wǒ shàng kè。
Mom calls me to class.
我每天都要上课。
wǒ měi tiān dōu yào shàng kè。
I have to attend classes every day.
今天不上课，可以玩。
jīn tiān bú shàng kè， kě yǐ wán。
Today we don't have class, so we can play.
上课铃响了，我们要去教室。
shàng kè líng xiǎng le， wǒ men yào qù jiào shì。
The bell for class has rung, and we need to go to the classroom.
周末不上课，可以休息。
zhōu mò bú shàng kè， kě yǐ xiū xi。
On weekends, we don't have classes, so we can rest.
5 mini stories
小明每天早上七点去上学，然后上课。
xiǎo míng měi tiān zǎo shàng qī diǎn qù shàng xué， rán hòu shàng kè。
Xiaoming goes to school at seven in the morning and then attends class.
老师布置了作业，要求我们明天上课前完成。
lǎo shī bù zhì le zuò yè， yāo qiú wǒ men míng tiān shàng kè qián wán chéng。
The teacher assigned homework that we need to finish before tomorrow's class.
今天是周末，小红不上课，和朋友去公园玩。
jīn tiān shì zhōu mò， xiǎo hóng bú shàng kè， hé péng yǒu qù gōng yuán wán。
Today is the weekend, so Xiaohong doesn't have classes and goes to the park with friends.
上课时要认真听讲，不要讲话。
shàng kè shí yào rèn zhēn tīng jiǎng， bú yào jiǎng huà。
We should listen carefully in class and not talk.
如果迟到，老师会批评你没有按时上课。
rú guǒ chí dào， lǎo shī huì pī píng nǐ méi yǒu àn shí shàng kè。
If you are late, the teacher will criticize you for not attending class on time.
Mini dialogue
准备上课
A
快坐好，要上课了。
Kuài zuò hǎo, yào shàng kè le.
Sit down quickly, class is about to start.
B
好的，我准备好上课了。
Hǎo de, wǒ zhǔnbèi hǎo shàng kè le.
Okay, I am ready for class.
喜欢上课
A
你喜欢上课吗？
Nǐ xǐhuān shàng kè ma?
Do you like attending class?
B
我喜欢上课，老师讲故事很好听。
Wǒ xǐhuān shàng kè, lǎoshī jiǎng gùshì hěn hǎotīng.
I like attending class, the teacher tells stories very well.
Related words and contrasts
opposite
下课
xiàkè
finish class
上课 means to start class, 下课 means class is over.
related
学习
xuéxí
to study; to learn
You 学习 when you 上课.