When communicating in Chinese you may often make mistakes using Chinese grammar like:
False:
我有几中国朋友。
Wǒ yǒu jǐ zhōnɡɡuó pénɡyou.
True:
我有几个中国朋友。
Wǒ yǒu jǐ ɡè zhōnɡɡuó pénɡyou.
几表示大于一小于十的不确定的数目。几和量词通常在一起使用。应在几的后面加上朋友的计量单位个。
几 can be substituted for the numbers from two to nine. It is generally used with a measure word. 个 which can indicate the suit of friends shoudl be added after 几.