Usages of yǐhòu
有的 同学 以后 想 当 老师， 有的 同学 想 当 作家。Yǒude tóngxué yǐhòu xiǎng dāng lǎoshī, yǒude tóngxué xiǎng dāng zuòjiā.
Some classmates want to be teachers in the future; some classmates want to be writers.
下课 以后 我们 一起 去 公园 散步。xiàkè yǐhòu wǒmen yìqǐ qù gōngyuán sànbù.
After class we will go take a walk in the park together.
以后 我 想 当 老师。yǐhòu wǒ xiǎng dāng lǎoshī.
In the future I want to be a teacher.
Elon.io is an online learning platform
We have an entire course teaching Chinese grammar and vocabulary.