classifier for long thin things (rivers, cracks etc), barriers (walls, doors etc), questions (in an exam etc), commands, courses in a meal, steps in a process
province (of Korea or Japan)
channel
method
doctrine
teachings
昨晚
zok3 maan5
last night
怎麼了
zam2 mo1 liu5
what happened
Learn Stroke Order
See how to write "知不知" with stroke-by-stroke animation