Usages of sān
她 一共 发 了 三 封 邮件 给 我。Tā yígòng fā le sān fēng yóujiàn gěi wǒ.
She sent me three emails in total.
他 最近 一共 借 了 三 本 书， 明天 记得 还。Tā zuìjìn yígòng jiè le sān běn shū, míngtiān jìde huán.
He has borrowed three books in total recently; remember to return them tomorrow.
Elon.io is an online learning platform
We have an entire course teaching Chinese grammar and vocabulary.