这个男孩儿会唱很多中文歌。

Zhège nánháir huì chàng hěn duō Zhōngwén gē.

This boy can sing many Chinese songs.

那个男孩儿是我弟弟。

Nàge nánháir shì wǒ dìdi.

That boy is my younger brother.

那个男孩儿在公园里踢足球。

Nà gè nánháir zài gōngyuán lǐ tī zúqiú.

That boy is playing soccer in the park.