2 sentences

1. 他张大着口，还没回过神来。

   tā zhāng​dà zhe kǒu, hái méi huí​guò​shén lái.

   He stood there with his mouth wide open, still in a daze.

   Source: Dong Chinese Dictionary

2. 他张大着嘴巴，惊讶地看着前方。

   tā zhāng​dà zhe zuǐ​ba, jīng​yà de kàn zhe qián​fāng.

   He gaped in surprise, looking forward.

   Source: Dong Chinese Dictionary