Usage note
“久”用来表示时间的长久。比如,我们可以说‘我很久没见你了’来表达长时间不见的意思。
jiǔ lái bǎo shí de cháng jiǔ. rúbùkěyǐ, wǒ men kěyǐ shuō ‘wǒ hěn jiǔ méi jiàn nǐ le’ lái biǎo达长时间不见的意思。
“久” is used to indicate a long time. For example, we can say '我很久没见你了' to express that we haven't seen each other for a long time.