6 sentences

1. 你收到了一封情书。

   nǐ shōu​dào le yī fēng qíng​shū.

   You got a love letter.

   Source: OpenSubtitles

2. 我写给你的每封信都是情书。

   wǒ xiě gěi nǐ de měi fēng xìn dōu shì qíng​shū.

   Every letter I've ever written to you has been a love letter.

   Source: OpenSubtitles

3. 她在闺房里静静地读着情书。

   tā zài guī​fáng lǐ jìng jìng de dú zhe qíng​shū.

   She was quietly reading a love letter in her boudoir.

   Source: Dong Chinese Dictionary

4. 他鼓起勇气给她写了一封情书。

   tā gǔ​qǐ yǒng​qì gěi tā xiě le yī fēng qíng​shū.

   He mustered up the courage to write her a love letter.

   Source: Dong Chinese Dictionary

5. 他写的那些情书太肉麻了，我读不下去。

   tā xiě de nà​xiē qíng​shū tài ròu​má le, wǒ dú bù xià​qù.

   The love letters he wrote are so cheesy that I can't bear to read them.

   Source: Dong Chinese Dictionary

6. 他在收拾旧物时，无意中发现了一封老情书。

   tā zài shōu​shi jiù​wù shí, wú​yì​zhōng fā​xiàn le yī fēng lǎo qíng​shū.

   While tidying up old belongings, he came across an old love letter by chance.

   Source: Dong Chinese Dictionary