grammar → 能
TSUMUGU · TBCL 2 (est.) · 語法
grammar point · tier 1 · 能 — capacity/possibility auxiliary (can, by capacity or conditions)
· néng
Sits before a verb to assert the subject has the inherent capacity, room, or conditions to do it. (Learned skill is 會; permission is 可以.)

字源 FORM what the parts do

能 is a bear drawn whole: head (厶), heavy body (月), two clawed paws (匕匕). An animal so strong its name came to mean strength — the capacity inside a thing. Set before the verb, it lends that capacity to the action.

故事 STORY a scene to remember it by

The bear's strength is already in its body; the load goes on and the body bears it. Take the strength away and the same load buckles it.
字源記憶法
框 · Frame
[subj] 能 [verb phrase]
觸 · Trigger
You want to say something is within reach — the capacity or the conditions for it are there.
序 · The move
1name the subject that holds the capacityis this about raw capacity or conditions, not a trained skill? a skill is 會
2set 能 directly before the verbis permission what you mean instead? then it is 可以
3let the verb phrase followto deny present capacity, is it 不能 (not 沒能)?
例 · Examples
1他的車can (has the capacity to)seat / sit七個人。
His car can seat seven people.
界 · Boundary
能 faces capacity and conditions — the car holds seven, my arm can lift this. 會 faces a learned skill — I can swim, I can read Chinese. 能 asks is there room/strength; 會 asks have you learned it.
可以
能 says the capacity is there; 可以 says it is allowed. 這裡能停車 — there is space to park; 這裡可以停車 — parking is permitted here.
learned skill with 能: 我能說中文 → 我會說中文(會 for an acquired skill)
permission with 能 mistaken for capacity: 老師,我能去廁所嗎 → 老師,我可以去廁所嗎(asking leave is 可以)
denying present capacity with 沒: 我沒能搬這個 → 我不能搬這個(present capacity is barred by 不能; 沒能 reports a past failure to manage it)
English 'can' covers capacity, skill, and permission at once, so learners reach for one word where Chinese splits the job across 能, 會, and 可以.