5 sentences

1. 老夫今年已年过六旬。

   lǎo​fū jīn​nián yǐ nián guò liù xún.

   I am already over sixty years old.

   Source: Dong Chinese Dictionary

2. 那位老教授已经年过八旬。

   nà wèi lǎo jiào​shòu yǐ​jīng nián guò bā xún.

   That old professor is already over eighty years old.

   Source: Dong Chinese Dictionary

3. 老人家虽然年过八旬，但精神依然很健旺。

   lǎo​rén​jiā suī​rán nián guò bā xún, dàn jīng​shen yī​rán hěn jiàn wàng.

   Although the old man is over eighty, his spirits are still very robust.

   Source: Dong Chinese Dictionary

4. 旬月之间，工程便已宣告竣工。

   xún yuè zhī​jiān, gōng​chéng biàn yǐ xuān​gào jùn​gōng.

   Within a month or so, the project was declared complete.

   Source: Dong Chinese Dictionary

5. 根据规定，他每旬都要向总部汇报工作进度。

   gēn​jù guī​dìng, tā měi xún dōu yào xiàng zǒng​bù huì​bào gōng​zuò jìn​dù.

   According to the regulations, he must report the work progress to headquarters every ten days.

   Source: Dong Chinese Dictionary