3 sentences for 扣 (kòu — cover)

1. 他把杯子扣在桌子上。

   tā bǎ bēi​zi kòu zài zhuō​zi shàng.

   He placed the cup upside down on the table.

   Source: Dong Chinese Dictionary

2. 他用手指轻轻一扣，硬币就弹了出去。

   tā yòng shǒu​zhǐ qīng​qīng yī kòu, yìng​bì jiù tán le chū​qù.

   With a flick of his finger, the coin was sent flying.

   Source: Dong Chinese Dictionary

3. 那孩子的帽子没戴稳，歪歪地扣在顶上。

   nà hái​zi de mào​zi méi dài wěn, wāi wāi de kòu zài dǐng shàng.

   The child's hat wasn't on securely and sat crookedly on top of his head.

   Source: Dong Chinese Dictionary