HSK 5 · VERSION 2.0#62
Result Complement “kāi”
开
How it works
As a result complement, 开 (kāi) often means that something becomes open, separate, spread apart, or clear. In more advanced usage, it can also suggest release or unfolding.
The pattern
Verb + 开 (kāi)
Example sentences
听到这个消息以后，他一下子笑开了。
After hearing the news, he suddenly burst into laughter.
这件事你先别着急，慢慢想，总会想开的。
Don’t worry about this matter first. Think about it slowly, and sooner or later you will come to terms with it.
花刚刚开了，整个院子闻起来都特别香。
The flowers have just opened, and the whole yard smells especially fragrant.
Key point
As a complement, 开 (kāi) can move from literal physical opening to emotional or mental release.