人教版八年级下册英语教材共分为十个单元，各单元名称如下：

Unit 1: How do you study for a test？

Unit 2: I used to be afraid of the dark.

Unit 3: Teenagers should be allowed to choose their own clothes.

Unit 4: I have a pen pal in Australia.

Unit 5: Do you want to watch a game show？

Unit 6: Im going to study computer science.

Unit 7: Will people have robots？

Unit 8: Whats the best movie theater？

Unit 9: By the time I got outside, the bus had already left.

Unit 10: What's the matter？

建议：在学习过程中，可以结合每个单元的主题和语法点进行有针对性的复习和练习，以便更好地掌握教材内容。