4 sentences

1. 锅里的水已经烧开了。

   guō lǐ de shuǐ yǐ​jīng shāo​kāi le.

   The water in the pot has boiled.

   Source: Dong Chinese Dictionary

2. 水烧开后，加盖焖五分钟。

   shuǐ shāo​kāi hòu, jiā​gài mèn wǔ fēn​zhōng.

   After the water boils, cover it and simmer for five minutes.

   Source: Dong Chinese Dictionary

3. 水壶里的水烧开了。

   shuǐ​hú lǐ de shuǐ shāo​kāi le.

   The water in the kettle has boiled.

   Source: Dong Chinese Dictionary

4. 水烧开后冒出了大量的蒸汽。

   shuǐ shāo​kāi hòu mào​chū le dà​liàng de zhēng​qì.

   A large amount of steam rose after the water came to a boil.

   Source: Dong Chinese Dictionary