Example sentences

• 我们都不知道老师为什么忽然生气，可能是因为有人在玩手机。

  wǒmen dōu bù zhīdào lǎoshī wèishénme hūrán shēngqì, kěnéng shì yīnwèi yǒurén zài wán shǒujī.

  We do not know why the teacher was suddenly so angry, maybe it was because someone was playing on their phone