3 sentences for 來信 (lái​xìn — to send a letter)

1. 我希望他来信更勤些。

   wǒ xī​wàng tā lái xìn gèng qín xiē.

   I wish he would write more often.

   Source: Tatoeba

2. 我欢迎来信和提问。

   wǒ huān​yíng lái xìn hé tí wèn.

   I welcome letters and questions.

   Source: CCMatrix

3. 她已经两周没给我来信了。

   tā yǐ​jing liǎng zhōu méi gěi wǒ lái xìn le.

   She hasn't written to me for 2 weeks.

   Source: OpenSubtitles