3 sentences for 功夫 (gōng​fu — skill)

1. 他的书法功夫很深。

   tā de shū​fǎ gōng​fu hěn shēn.

   His calligraphy skills are very profound.

   Source: Dong Chinese Dictionary

2. 他笔下功夫极深，文章的立意非常高远。

   tā bǐ​xià gōng​fu jí shēn, wén​zhāng de lì​yì fēi​cháng gāo​yuǎn.

   He has superb writing skills, and the themes of his articles are very profound.

   Source: Dong Chinese Dictionary

3. 没想到你年纪轻轻，这手书法的功夫竟然如此到家。

   méi xiǎng​dào nǐ nián​jì qīng​qīng, zhè shǒu shū​fǎ de gōng​fu jìng​rán rú​cǐ dào​jiā.

   I didn't expect that at such a young age, your calligraphy skills would be so masterful.

   Source: Dong Chinese Dictionary