Mandarin · Chapter 4 · Lesson 9 · Grammar primer
Possession with 的
我的书, 老师的车. How 的 joins a possessor to a possessed noun, and the close-relation cases where it gets dropped (我妈, 我哥).
The lesson is a long-form read rather than a flashcard session. Open the primer below, work through it once, then come back and continue with the next lesson.
Read the primer