100 Chinese Characters Marathon ...

的 de :possessive, adjectival suffix.
(ex. 别的)

一 yī :one; a, an; alone.
(ex. 一些)

是 shì : to be.
(ex. 要是)



不 bù :not; negative prefix.
(ex. 不用)

了 le :to finish; particle of completed action.
(ex. 算了)