…就是了
just do it, that’s all; nothing more to it
Structure
（主语）动词短语 就是了 ／ （只是）情况 就是了
What it means
Spoken. At the end of a sentence it shrinks the matter down: “just do X, no need for more”; after a statement it means “only…, that’s all”.
How it is built
(Subject) + verb phrase + 就是了: 你放心去就是了 (just go, don’t worry). Statement + 就是了: 只是有点累就是了 (I’m just a bit tired, that’s all).
When to use it
With 你 it reassures or brushes aside; with 我 it promises, sometimes a little impatiently: 好，我不说就是了. The “that’s all” sense is like 罢了 or 而已 (不过…罢了, lesson 3-11).
Watch out
Keep the final 了: 就是了 is the fixed ending. Don’t confuse it with 就是 at the start of a clause, which means “it’s just that…”.
Examples
反正就几毛钱，想看就看就是了。
It’s only a few jiao anyway: if I want to watch, I just watch.
你放心，明天我准时把稿件交给你就是了。
Don’t worry: I’ll get the manuscript to you on time tomorrow, I promise.
这部剧也没什么特别的，演员长得好看就是了。
There’s nothing special about this series; the actors are good-looking, that’s all.
Learn this in Lesson 65 · HSK 6: 网文与短剧 (Web novels and micro-dramas)
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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