5 sentences

1. 苑老师正在实验室里给学生们讲课。

   Yuàn lǎo​shī zhèng​zài shí​yàn​shì lǐ gěi xué​sheng men jiǎng​kè.

   Teacher Yuan is giving a lecture to students in the laboratory.

   Source: Dong Chinese Dictionary

2. 王老师讲课非常生动，学生们都很喜欢。

   Wáng lǎo​shī jiǎng​kè fēi​cháng shēng​dòng, xué​sheng men dōu hěn xǐ​huan.

   Teacher Wang's lectures are very vivid, and the students all enjoy them.

   Source: Dong Chinese Dictionary

3. 罗宾逊先生正在耐心地给他的学生们讲课。

   Luó​bīn​xùn xiān​sheng zhèng​zài nài​xīn de gěi tā de xué​sheng men jiǎng​kè.

   Mr. Robinson is patiently lecturing his students.

   Source: Dong Chinese Dictionary

4. 李老师的讲课风格非常风趣，同学们都很喜欢听。

   Lǐ lǎo​shī de jiǎng​kè fēng​gé fēi​cháng fēng​qù, tóng​xué men dōu hěn xǐ​huan tīng.

   Teacher Li's teaching style is very witty, and the students all love listening to him.

   Source: Dong Chinese Dictionary

5. 汤老师教我们数学，他讲课的内容非常生动有趣。

   Tāng lǎo​shī jiāo wǒ​men shù​xué, tā jiǎng​kè de nèi​róng fēi​cháng shēng​dòng yǒu​qù.

   Mr. Tang teaches us mathematics, and his lectures are very vivid and engaging.

   Source: Dong Chinese Dictionary