2 sentences

1. 这个班共有三十个学生。

   zhè gè bān gòng​yǒu sān​shí gè xué​sheng.

   There are thirty students in this class in total.

   Source: Dong Chinese Dictionary

2. 这座房子由他们兄弟二人共有。

   zhè zuò fáng​zi yóu tā​men xiōng​dì èr rén gòng​yǒu.

   This house is jointly owned by the two brothers.

   Source: Dong Chinese Dictionary