The 一 … 就 pattern (yī … jiù) is very common in Chinese grammar. It’s used
to say things like “as soon as”, “once” and “whenever”, so it’s a very useful
and important structure to know.
The basic structure is:
[subject] 一 [action] 就 [another action]
This is equivalent to saying “As soon as [subject] does [action], they do
[another action]” or “whenever [subject] does [action], they do
[another action]”.
You can also use this structure with two different subjects. In that case, the
second subject just goes before 就. This will seem natural once you see it in
the example sentences below.
Let’s have a look at the slightly different meanings this structure can have one
by one.
一 … 就: “as soon as”
Perhaps the most common use of the 一 … 就 pattern is to say “as soon as”. You
just put the first event or action after 一, and the following event or action
after 就.
Have a look at some example sentences:
Notice how the actions are put into the same slots in each of the sentences:
一 [first action] 就
[second action].
一 … 就: “once” or “when”
Using 一 … 就 to mean “once” or “when” is actually very similar to using it to
mean “as soon as”. It’s just an alternative translation in English. The meaning
is the same. In all cases, this pattern is about doing one thing immediately
after another.
Some examples:
In all of the above example sentences, “as soon as”, “once” and “when” are
pretty much interchangeable as translations.
一 … 就: “whenever”
Finally, this pattern can also be used to express “whenever”. This is used to
talk about habitual actions that happen whenever some other event or action
happens.
Let’s have a look at some example sentences:
Hopefully you can see the common theme for using 一 … 就. It’s always about
things that happen right after or because of other events.
See also: