3 sentences for 男生 (nán​shēng — male student)

1. 我们班有二十个男生。

   wǒ​men bān yǒu èr​shí gè nán​shēng.

   There are twenty boys in our class.

   Source: Dong Chinese Dictionary

2. 这个班的女生比男生多。

   zhè gè bān de nǚ​shēng bǐ nán​shēng duō.

   There are more girls than boys in this class.

   Source: Dong Chinese Dictionary

3. 他和他班上其他男生一样高。

   tā hé tā bān shàng qí​tā nán​shēng yī​yàng gāo.

   He's just as tall as the other boys in his class.

   Source: Tatoeba