HSK 3
Háizi zài rénqún zhōng zǒusàn le.
The child got separated from the group in the crowd.
HSK 7-9
Wǒmen zài jǐngqū zǒusàn le, qǐng zài ménkǒu děng wǒ.
We got separated at the scenic area - please wait for me at the entrance.
HSK 7-9
Zhànluàn zhōng, yījiārén zǒusàn le.
The family was separated during the war.