2 sentences for 笨 (bèn — clumsy)

1. 我手脚很笨，干不了这种细活。

   wǒ shǒu​jiǎo hěn bèn, gàn bù liǎo zhè zhǒng xì​huó.

   I am very clumsy and can't do such delicate work.

   Source: Dong Chinese Dictionary

2. 他手脚很笨，干起活来显得很蠢。

   tā shǒu​jiǎo hěn bèn, gàn qǐ huó lái xiǎn​de hěn chǔn.

   He is very clumsy and looks foolish while working.

   Source: Dong Chinese Dictionary