How to Say ‘So fast’ in Simplified Chinese
好快
hǎo kuài
[how kwai]
💬 Usage Tip: [好] before an adjective can mean “so” or “very” in spoken Chinese, so [好快] is “so fast,” not “good fast.”
🇨🇳 In China: This pattern is common in casual speech: [好看] [好紧张] [好快]. Easy and very natural.
Phrase Breakdown
好
hǎo
[how]
very; quite; so
Here 好 is used as an intensifier, meaning 'very' or 'so' before an adjective.
我的心跳好快，真的有点吓人。
My heartbeat is so fast; it's honestly a little scary.
快
kuài
[kwai]
fast; quick
An adjective meaning rapid in speed, movement, or tempo.
比赛最后几分钟过得好快。
The last few minutes of the match went by so fast.
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