2 sentences for 换成 (huàn​chéng — replace)

1. 他把床上的旧单子换成了新的。

   tā bǎ chuáng shàng de jiù dān​zi huàn​chéng le xīn de.

   He replaced the old sheets on the bed with new ones.

   Source: Dong Chinese Dictionary

2. 他决定把旧沙发换成一个新沙发。

   tā jué​dìng bǎ jiù shā​fā huàn​chéng yī gè xīn shā​fā.

   He decided to replace the old sofa with a new one.

   Source: Dong Chinese Dictionary