2 sentences for 绵绵 (mián​mián)

1. 窗外阴雨绵绵，已经下了一整天。

   chuāng wài yīn​yǔ mián​mián, yǐ​jīng xià le yī zhěng​tiān.

   It has been drizzling outside all day long.

   Source: Dong Chinese Dictionary

2. 两人临别时情意绵绵，依依不舍。

   liǎng rén lín​bié shí qíng​yì mián​mián, yī​yī​bù​shě.

   The two were full of tender affection and reluctant to part at their farewell.

   Source: Dong Chinese Dictionary