When communicating in Chinese you may often make mistakes using Chinese grammar like:

False:

    我们的老师们是英国人。

    Wǒmen de lǎoshī men shì Yīngguó rén

True:

    我们的老师是英国人。

    Wǒmen de lǎoshī shì Yīngguó rén.

“我们”表示复数，作修饰成分时，被修饰成分不能用复数形式。应删去“老师”后边的“们”。

A head word can not appear in plural form if it is modified by a plural pronoun such as 我们. 们 should be deleted.