2 sentences

1. 他一连几天没合眼。

   tā yī​lián jǐ tiān méi hé​yǎn.

   He didn't close his eyes for several days straight.

   Source: Dong Chinese Dictionary

2. 他简直像个超人，连续工作了二十小时都没合眼。

   tā jiǎn​zhí xiàng gè chāo​rén, lián​xù gōng​zuò le èr​shí xiǎo​shí dōu méi hé​yǎn.

   He's practically a superman; he worked for twenty hours straight without closing his eyes once.

   Source: Dong Chinese Dictionary