HSK 2 grammar · adverb
在
(正)在 + verb — in progress
Pattern
+ +
( ) can be left out · other words may come before, between and after
How it works
(正)在 before a verb marks an action happening right now, in progress. It differs from 在 + place, which tells location.
Examples
我在看书。
Wǒ zài kàn shū.
I'm reading.
他们正在吃饭。
Tāmen zhèngzài chī fàn.
They are eating right now.
Related

See it in a story
In the app, 在 is underlined wherever it appears in the stories you read, and practised with sentences from them. Free.