3 sentences

1. 他被拘留了一个月。

   tā bèi jū​liú le yī​ge yuè.

   He was detained for one month.

   Source: United Nations

2. 我在警察局被拘留了几个小时。

   wǒ zài jǐng​chá​jú bèi jū​liú le jǐ​ge xiǎo​shí.

   I was detained for several hours at the police station.

   Source: CCMatrix

3. 我被拘留了一个星期但没有被指控。

   wǒ bèi jū​liú le yī​ge xīng​qī dàn méi​yǒu bèi zhǐ​kòng.

   I was detained for a week but not charged.

   Source: CCMatrix