4 sentences

1. 大江之水滚滚东流。

   dà​jiāng zhī shuǐ gǔn​gǔn dōng liú.

   The waters of the great river roll eastward.

   Source: Dong Chinese Dictionary

2. 长江是一条大江。

   Cháng Jiāng shì yī tiáo dà​jiāng.

   The Yangtze is a great river.

   Source: Dong Chinese Dictionary

3. 船只在夜色中悄悄渡过了大江。

   chuán​zhī zài yè​sè zhōng qiāo​qiāo dù​guò le dà​jiāng.

   The ships crossed the great river quietly under the cover of night.

   Source: Dong Chinese Dictionary

4. 由于连续降雨，大江里的水势显得极洪。

   yóu​yú lián​xù jiàng​yǔ, dà​jiāng lǐ de shuǐ​shì xiǎn​de jí hóng.

   Due to the continuous rainfall, the river's water flow has become extremely powerful.

   Source: Dong Chinese Dictionary