Usages of shàngkè
明天 八 点 开始 上课， 大家 要 准时 到 教室。míngtiān bā diǎn kāishǐ shàngkè, dàjiā yào zhǔnshí dào jiàoshì.
Class starts at eight tomorrow; everyone should arrive at the classroom on time.
很 抱歉， 明天 我 不 能 来 上课。hěn bàoqiàn, míngtiān wǒ bù néng lái shàngkè.
I’m sorry, I can’t come to class tomorrow.
请 你 把 这些 资料 打印出来， 下午 上课 的 时候 要 用。qǐng nǐ bǎ zhèxiē zīliào dǎyìnchūlái, xiàwǔ shàngkè de shíhou yào yòng.
Please print out these materials; we’ll need them in class this afternoon.
Elon.io is an online learning platform
We have an entire course teaching Chinese grammar and vocabulary.