HSK 1
了
le助
(completed action marker); (modal particle indicating change of state, situation now); (modal particle intensifying preceding clause)
下课了，我们回家吧。
Xiàkè le, wǒmen huí jiā ba.
Class is over; let's go home.
Say it
Hold the button, say it, then let go.
Other HSK words sharing a character
Also free:
New in the HSK 3.0 word list at level 1.