2 sentences for 何况 (hé​kuàng)

1. 他连普通话都说不好，何况是古文呢？

   tā lián pǔ​tōng​huà dōu shuō bù hǎo, hé​kuàng shì gǔ​wén ne?

   He can't even speak Mandarin well, let alone classical Chinese.

   Source: Dong Chinese Dictionary

2. 我不打算去，何况我还有很多工作没做完。

   wǒ bù dǎ​suàn qù, hé​kuàng wǒ hái yǒu hěn​duō gōng​zuò méi zuò​wán.

   I don't plan to go, not to mention I still have a lot of work to finish.

   Source: Dong Chinese Dictionary