3 sentences

1. 她开始对自己丧失信心。

   tā kāi​shǐ duì zì​jǐ sàng​shī xìn​xīn.

   She began to lose confidence in herself.

   Source: CCMatrix

2. 如果他们知道了钻透那坚硬的岩石有多么困难，他们会丧失信心的。

   rú​guǒ tā​men zhī​dao le zuān tòu nà jiān​yìng de yán​shí yǒu duō​me kùn​nan, tā​men huì sàng​shī xìn​xīn de.

   If they knew how difficult it was to drill through the hard rock, they would lose heart.

   Source: CCMatrix

3. 我相信，这是为什么我们中的许多人至少在一段时间里丧失信仰的原因。

   wǒ xiāng​xìn, zhè shì wèi​shén​me wǒ​men zhōng de xǔ​duō rén zhì​shǎo zài yī duàn shí​jiān li sàng​shī xìn​yǎng de yuán​yīn.

   This, I believe, is why so many of us lose faith, at least for a time.

   Source: UM-Corpus: Education