4 sentences

1. 他说他们让我们失忆了。

   tā shuō tā​men ràng wǒ​men shī​yì le.

   He said they made us forget.

   Source: OpenSubtitles

2. 你是说他失忆了？

   nǐ shì shuō tā shī​yì le?

   Are you saying he has amnesia?

   Source: OpenSubtitles

3. 你不是失忆了吗？

   nǐ bù shì shī​yì le ma?

   Didn't you have amnesia?

   Source: OpenSubtitles

4. 他患有选择性失忆，只记得对自己有利的事情。

   tā huàn​yǒu xuǎn​zé​xìng shī​yì, zhǐ jì​de duì zì​jǐ yǒu​lì de shì​qing.

   He suffers from selective amnesia and only remembers things that are to his advantage.

   Source: Dong Chinese Dictionary