Subject + 把 + Object + 改成 + New Form
The verb 改成 (gǎichéng) means "to change into" or "to convert to" and indicates transforming something from one form or state into another. The element after 改成 specifies the new form or result. It is commonly used when talking about modifying plans, formats, or designs.
会议时间改成下午三点了,你知道吗?
huìyì shíjiān gǎi chéng xiàwǔ sān diǎn le, nǐ zhīdào ma?
The meeting time has been changed to 3 PM — did you know?
我把文件格式改成了PDF,方便你打印。
wǒ bǎ wénjiàn géshì gǎi chéng le PDF, fāngbiàn nǐ dǎyìn.
I changed the file format to PDF so it's easier for you to print.
老板决定把办公室改成开放式的。
lǎobǎn juédìng bǎ bàngōngshì gǎi chéng kāifàngshì de.
The boss decided to convert the office to an open-plan layout.