Subject + 撞 + 到 + Object
撞 (zhuàng) is a verb meaning "to hit," "to bump into," or "to collide with." It describes an impact between objects or a person and an object, and is used for both accidental collisions and deliberate strikes.
他骑车的时候不小心撞到了一棵树。
Tā qí chē de shíhou bù xiǎoxīn zhuàng dào le yì kē shù.
He accidentally hit a tree while riding his bike.
两辆车在路口撞在了一起。
Liǎng liàng chē zài lùkǒu zhuàng zài le yìqǐ.
Two cars collided at the intersection.
我刚才开门的时候撞到了头。
Wǒ gāngcái kāi mén de shíhou zhuàng dào le tóu.
I bumped my head when I opened the door just now.