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Chinese Grammar: Lesson: Expressing “once then” & “as soon as”

As soon as Lupishu started studying Chinese, he couldn't stop speaking Chinese with his friends. Did that happen to you, guys? Once you begin to learn Chinese, you soon fall in love with learning Chinese. It’s cool! Now, you are wondering how to say “once then” and “as soon as” in Chinese, I guess!?

Let see how to use them and if there are any differences between the two.

Expressing “once then” with 一旦...

一旦... is a pattern you can use to indicate certain conditions. As a result, this pattern expresses cause and effect. It shows that after a specific situation occurred, a consequence happened. This grammar structure is perfect to say once something has happened, something else will happen later.


一旦 + Certain condition, Subject + + Consequence


一旦 可以 安心 电视
Once he leaves, you can watch TV at ease.

一旦 说出 生气
Once you speak up to say that, he will be angry.

一旦刮风这里 非常
Once the wind starts blowing, it’ll get cold here.

Expressing “as soon as” with ...

The difference between 一旦... and ... is time. This latter pattern is used to convey that one thing happened and another thing happened right afterward. Its use is similar to "as soon as" in English, i.e., something happening quickly after one thing happened. ... is the structure you need to indicate events in rapid succession.


+ Event 1 + + Event 2


I will give it to you as soon as I get the book.

I’ll tell you as soon as I see him.

妈妈 孩子开始 电视
As soon as his mother left, the kid began to watch TV.

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