Usages of shàngwǔ
她 经常 上午 去 图书馆 读 文章。tā jīngcháng shàngwǔ qù túshūguǎn dú wénzhāng.
She often goes to the library in the morning to read articles.
今天 上午 我 在 公司 开会， 下午 才 有空。jīntiān shàngwǔ wǒ zài gōngsī kāihuì, xiàwǔ cái yǒukòng.
This morning I had a meeting at the company; I only have free time in the afternoon.
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We have an entire course teaching Chinese grammar and vocabulary.