7 sentences

1. 张开嘴巴闭上眼睛。

   zhāng​kāi zuǐ​ba bì​shang yǎn​jing.

   Open your mouth and close your eyes.

   Source: Tatoeba

2. 他吃完饭用纸巾擦了擦嘴巴。

   tā chī​wán fàn yòng zhǐ​jīn cā le cā zuǐ​ba.

   He wiped his mouth with a tissue after finishing his meal.

   Source: Dong Chinese Dictionary

3. 他用手掩住嘴巴，不敢笑出声来。

   tā yòng shǒu yǎn zhù zuǐ​ba, bù gǎn xiào chū​shēng lái.

   He covered his mouth with his hand, not daring to laugh out loud.

   Source: Dong Chinese Dictionary

4. 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

5. 他虽然嘴巴不饶人，但心肠其实很软。

   tā suī​rán zuǐ​ba bù ráo rén, dàn xīn​cháng qí​shí hěn ruǎn.

   Although he has a sharp tongue, he is actually very soft-hearted.

   Source: Dong Chinese Dictionary

6. 他迅速用手捂住了嘴巴，以免笑出声来。

   tā xùn​sù yòng shǒu wǔ​zhù le zuǐ​ba, yǐ​miǎn xiào chū​shēng lái.

   He quickly covered his mouth with his hand to keep from laughing out loud.

   Source: Dong Chinese Dictionary

7. 他气得打了对方一个嘴巴。

   tā qì de dǎ le duì​fāng yī gè zuǐ​ba.

   He was so angry that he gave the other person a slap in the face.

   Source: Dong Chinese Dictionary