I notice these two words come out frequently, but the meaning seems like be different. Who can tell me what is the difference.
If possible give me some examples too.
"己" is usually used by"自己". “已” is usually used something like “自己”
Notice that： 已：Something that is done (you can use this to mean time is overdue, ect). 己：A kind of expression of myself （自己）
For more, please check:
these are two totally different words in chinese. becareful about the writing about them, then you will know the difference between them, just like the english words "pee" and "pea".
己, for example:
自己 means Myself
己見 means my opinion
己身 means my body
已 for example:
已經 means: Already
已為 means: have become, as in "已为人妇"
已婚 means: married already