3 sentences for 挺 (tǐng — straight)

1. 他挺起胸膛向前走去。

   tā tǐng qǐ xiōng​táng xiàng​qián zǒu​qù.

   He puffed out his chest and walked forward.

   Source: Dong Chinese Dictionary

2. 她挺着个大肚子，行动很不方便。

   tā tǐng zhe gè dà​dù​zi, xíng​dòng hěn bù fāng​biàn.

   She is heavily pregnant, making it very difficult for her to move around.

   Source: Dong Chinese Dictionary

3. 他挺着大腹便便的肚子，在公园里散步。

   tā tǐng zhe dà​fù​pián​pián de dù​zi, zài gōng​yuán lǐ sàn​bù.

   He was walking in the park, sporting a large potbelly.

   Source: Dong Chinese Dictionary