4 sentences

1. 原谅我冒昧闯入。

   yuán​liàng wǒ mào​mèi chuǎng​rù.

   Forgive me for barging in.

   Source: OpenSubtitles

2. ‎冒昧问一下，妳父母何时过世？

   ‎ mào​mèi wèn yī​xià, nǐ fù​mǔ hé​shí guò​shì?

   If I may ask, when did your parents pass away?

   Source: OpenSubtitles

3. 恕我冒昧，我想请教您一个问题。

   shù wǒ mào​mèi, wǒ xiǎng qǐng​jiào nín yī gè wèn​tí.

   Forgive my presumption, but I would like to ask you a question.

   Source: Dong Chinese Dictionary

4. 直接向初次见面的人询问私事是很冒昧的。

   zhí​jiē xiàng chū​cì jiàn​miàn de rén xún​wèn sī​shì shì hěn mào​mèi de.

   It is presumptuous to ask someone you've just met about their private affairs.

   Source: Dong Chinese Dictionary