5 sentences

1. 我们在楼顶看日落。

   wǒ​men zài lóu​dǐng kàn rì​luò.

   We are watching the sunset on the roof.

   Source: Dong Chinese Dictionary

2. 我们检查了楼顶。

   wǒ​men jiǎn​chá le lóu​dǐng.

   We checked the roof.

   Source: OpenSubtitles

3. 楼顶上的不锈钢水箱需要定期清洗。

   lóu​dǐng shàng de bù​xiù​gāng shuǐ​xiāng xū​yào dìng​qī qīng​xǐ.

   The stainless steel water tank on the roof needs to be cleaned regularly.

   Source: Dong Chinese Dictionary

4. 他在旧房子的楼顶加盖了一间阁楼。

   tā zài jiù fáng​zi de lóu​dǐng jiā​gài le yī jiān gé​lóu.

   He built an additional attic on the roof of the old house.

   Source: Dong Chinese Dictionary

5. 那名狙击手在楼顶埋伏了整整一个下午。

   nà míng jū​jī​shǒu zài lóu​dǐng mái​fú le zhěng​zhěng yī gè xià​wǔ.

   The sniper lay in ambush on the roof for the entire afternoon.

   Source: Dong Chinese Dictionary