3 sentences

1. 费了半天口舌，结果事儿还是落空了。

   fèi le bàn​tiān kǒu​shé, jié​guǒ shì r hái​shi lào​kōng le.

   Despite all the talking, the matter still fell through.

   Source: Dong Chinese Dictionary

2. 费了半天口舌，他终于答应了我们的请求。

   fèi le bàn​tiān kǒu​shé, tā zhōng​yú dā​ying le wǒ​men de qǐng​qiú.

   After a lot of talking, he finally agreed to our request.

   Source: Dong Chinese Dictionary

3. 别在背后议论别人，免得招惹口舌。

   bié zài bèi​hòu yì​lùn bié​ren, miǎn​de zhāo​rě kǒu​shé.

   Don't gossip about others behind their backs to avoid trouble.

   Source: Dong Chinese Dictionary