要不是…
if it were not for …; had it not been that …
Structure
要不是 已经发生的事 ， （早就／就）… 了
What it means
If it were not for …; had it not been that …: a counterfactual. Something really happened, and the main clause says what would otherwise have followed.
How it is built
要不是 + what really happened，(subject) + 早就／就 + imagined result + 了: 要不是你提醒我，我早就忘了 (If you had not reminded me, I would have forgotten long ago).
When to use it
Spoken and neutral; 若不是 is the written form. Unlike 如果不, the 要不是 clause is always a fact. It often expresses thanks or relief, sometimes blame.
Watch out
The 要不是 clause states a fact, not a guess about the future: ✗ 要不是明天下雨，我们就去 ✓ 如果明天不下雨，我们就去. The main clause usually ends in 了.
Examples
要不是亲身吃过亏，很多人是不会相信这句话的。
Had they not lost out themselves, many would not believe it.
要不是你提醒我，我早就忘了。
If you had not reminded me, I would have forgotten long ago.
Learn this in Lesson 57 · HSK 6: 存钱、炒股与理财 (Saving, stocks and money management)
A dialogue, a reading, word cards with audio and a drill that uses it, in Learn Chinese with Bao. The first lessons of every level are free.
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