7 sentences

1. 一年有四时：春、夏、秋、冬。

   yī nián yǒu sì shí: chūn, xià, qiū, dōng.

   A year has four seasons: spring, summer, autumn, and winter.

   Source: Dong Chinese Dictionary

2. 一年有四个季节：春、夏、秋、冬。

   yī nián yǒu sì gè jì​jié: chūn, xià, qiū, dōng.

   There are four seasons in a year: spring, summer, autumn, and winter.

   Source: Dong Chinese Dictionary

3. 冬天就要到了。

   dōng tiān jiù yào dào le.

   Winter is coming.

   Source: Dong Chinese Dictionary

4. 正值隆冬时节，外面雪花纷纷扬扬。

   zhèng​zhí lóng dōng shí​jié, wài​miàn xuě​huā fēn​fēn​yáng​yáng.

   In the depth of winter, snow is falling thick and fast outside.

   Source: Dong Chinese Dictionary

5. 春夏秋冬的轮回是不可抗拒的自然规律。

   chūn xià qiū dōng de lún​huí shì bù kě kàng​jù de zì​rán guī​lǜ.

   The cycle of the four seasons is an irresistible law of nature.

   Source: Dong Chinese Dictionary

6. 冬冬的鼓声响彻云霄。

   dōng dōng de gǔ​shēng xiǎng​chè​yún​xiāo.

   The thumping of the drums resounded through the sky.

   Source: Dong Chinese Dictionary

7. 冬先生是一位著名的教授。

   Dōng xiān​sheng shì yī wèi zhù​míng de jiào​shòu.

   Mr. Dong is a famous professor.

   Source: Dong Chinese Dictionary