我亲自去商店买了这些东西。
wǒ qīnzì qù shāngdiàn mǎi le zhèixiē dōngxī 。
I personally went to the store to buy these things.
他亲自负责这个项目的管理。
tā qīnzì fùzé zhègè xiàngmù de guǎnlǐ 。
He personally oversees the management of this project.
老师亲自给我们讲解这道题。
lǎoshī qīnzì gěi wǒmen jiǎngjiě zhè dào tí 。
The teacher personally explained this problem to us.