grammar → 可能補語
TSUMUGU · TBCL 4 (est.) · 語法
可能補語 grammar point · tier 4 · potential complement (V得/不+result)
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Potential: whether the verb can reach its result.

字源 FORM what the parts do

得 and 不 wedge into a resultative; V得 reaches the result, V不 falls short of it.

故事 STORY a scene to remember it by

The verb jumps for its result; 得 makes it across, 不 falls short.
自撰記憶法
框 · Frame
[verb] 得/不 [result]
例 · Examples
1看得懂／看不懂。
can understand / can't understand.
族 · Family
V得/不起Marks whether you can bear the cost the verb demands: V得起 can afford/sustain it, V不起 cannot.V得/不下fits or doesn't fit.V 得/不 了得了 manages it, 不了 falls short of finishing.V得/不來得來 it works out, 不來 it never takes.V得/不動Whether the action has the force to make the object move or shift.V得/不出來得出來 makes it out, 不出來 cannot.V得/不…Wedges 得 or 不 between a verb and its result to say whether the result can be reached.不…不…(能/得/可)"cannot not do it", so it must be done.