1 sentence

1. 为了看清楚黑板，他跟同桌调换了座位。

   wèi​le kàn qīng​chu hēi​bǎn, tā gēn tóng​zhuō diào​huàn le zuò​wèi.

   He swapped seats with his deskmate to see the blackboard better.

   Source: Dong Chinese Dictionary