免得grammar point · tier 1 · avertive 免得 (so as to avoid / lest)
· miǎnde
Marks an unwanted outcome the first action is taken to head off; you act now so that the bad thing never comes to pass.
字源 FORM what the parts do
免, miǎn, is the body that twists clear — to escape, to be spared. 得 follows worn light, the get-verb gone weightless, marking the thing that would otherwise come to pass. Together they reach for an outcome only to ward it off before it lands.
故事 STORY a scene to remember it by
Something bad swings down toward you; you drop low (免) and it closes on empty air.
字源記憶法
框 · Frame
[first action], 免得 [unwanted outcome].
觸 · Trigger
You are about to do something, and behind it is a bad result you are doing it to keep from happening.
序 · The move
1Do the sensible first action and state it.This clause is what you actually do, not the thing you fear.
2Put 免得 in front of the outcome you are heading off.What follows 免得 is unwanted — the thing the first action prevents.
3Name that bad outcome after 免得.Read it as 'so the bad thing does not happen', not 'in order to reach a goal'.
例 · Examples
1趕緊hurry up and把disposal marker — act on the object頭髮hair擦乾wipe dry，免得so as to avoid / lest感冒catch a cold了。
免得 ducks away from an unwanted outcome (act so the bad thing does not come); 為了 aims at a wanted goal (act so the good thing is reached). What follows 免得 is the result you fear; what follows 為了 is the result you want.
以免 is the same avert-the-bad move in formal or written register; 免得 is the everyday spoken twin. 省得 is the more colloquial 'save the trouble of' cousin. Same direction, different register.
為了感冒，把頭髮擦乾。 ✗ → 把頭髮擦乾，免得感冒。 ✓ (a result you fear takes 免得; 為了 would name it as a goal you want)
免得感冒，把頭髮擦乾。 ✗ → 把頭髮擦乾，免得感冒。 ✓ (the sensible action comes first; 免得 leads the warded-off outcome, it does not open the sentence)
我很冷，免得多穿一件。 ✗ → 我很冷，多穿一件。 ✓ (免得 needs a bad outcome after it, not the remedy)
English 'so that' covers both reaching a goal and avoiding a harm, so learners reach for 為了 where the second clause is the very thing being prevented — that slot belongs to 免得.