7 sentences

1. 我刚到家，外面就下起大雨了。

   wǒ gāng dào jiā, wài​miàn jiù xià​qǐ dà​yǔ le.

   I had just reached home when it started raining heavily outside.

   Source: Dong Chinese Dictionary

2. 我正要出门，不料天竟下起雨来。

   wǒ zhèng yào chū​mén, bù​liào tiān jìng xià​qǐ yǔ lái.

   I was just about to head out when it unexpectedly started to rain.

   Source: Dong Chinese Dictionary

3. 哟，外面什么时候下起这么大的雪了？

   yō, wài​miàn shén​me shí​hou xià​qǐ zhè​me dà de xuě le?

   Oh! When did it start snowing so heavily outside?

   Source: Dong Chinese Dictionary

4. 我正要出门的时候，天突然下起了大雨。

   wǒ zhèng yào chū​mén de shí​hou, tiān tū​rán xià​qǐ le dà​yǔ.

   Just as I was about to head out, it suddenly started to rain heavily.

   Source: Dong Chinese Dictionary

5. 此时已经是深夜，窗外突然下起了大雨。

   cǐ​shí yǐ​jīng shì shēn​yè, chuāng wài tū​rán xià​qǐ le dà​yǔ.

   It was already late at night when it suddenly started raining heavily outside.

   Source: Dong Chinese Dictionary

6. 天气陡变，刚才还晴空万里，现在却下起雨来。

   tiān​qì dǒu biàn, gāng​cái hái qíng​kōng​wàn​lǐ, xiàn​zài què xià​qǐ yǔ lái.

   The weather changed suddenly; it was clear just a moment ago, but now it's raining.

   Source: Dong Chinese Dictionary

7. 刚才还晴空万里，谁知道一下就下起了瓢泼大雨。

   gāng​cái hái qíng​kōng​wàn​lǐ, shéi zhī​dào yī​xià jiù xià​qǐ le piáo​pō​dà​yǔ.

   It was a clear, cloudless sky just a moment ago, then all of a sudden, it started pouring rain.

   Source: Dong Chinese Dictionary