一边...一边 yī biān yī biān
This structure denotes the simultaneity of two ongoing actions. The simplified form is 边...边。Example:
a)他一边喝啤酒一边看电视。
->He drinks a beer and watch tv at the same time
Example:
a)他一边喝啤酒一边看电视。
->He drinks a beer and watch tv at the same time