back and forth

US /bæk ən fɔːrθ/
UK /bæk ən fɔːrθ/
"back and forth" picture
1.

heen en weer

moving first in one direction and then in the opposite direction repeatedly

:
The pendulum swung back and forth.
De slinger zwaaide heen en weer.
They walked back and forth across the room.
Ze liepen heen en weer door de kamer.
2.

heen en weer, tussen twee punten

between two points, people, or places

:
The ball went back and forth between the players.
De bal ging heen en weer tussen de spelers.
They exchanged emails back and forth for days.
Ze wisselden dagenlang e-mails heen en weer uit.