問問現在完成式的疑問

Of course NOT.

"I have cleaned my rooms" = 我已清潔房間，但沒有表明是否清潔得乾淨

如果你想表達"我宜家剛剛清潔晒d房間，d房間並且乾淨"的意思，你應該寫成為：

"I have just (剛剛) cleaned my rooms and the rooms are clean now."

HOPE I CAN HELP YOU ^_^

no
because this is present perfect tense
and it is the time between present and past

I have just cleaned my room throughly

The present perfect shows present results of past actions.Note that the words " just" is used to mean the immediate past.
I have cleaned my rooms.
or I have just cleaned my rooms.
It is irrelevant to whether the rooms are clean and tidy
or neat and clean.
If you want to clean the floor and furniture before spring-clean in Chinese new year, then you should say:-
eg:-I have cleaned my rooms like a cleaning woman did.

不完全正確 。現在完成式的 " I've cleaned my rooms." 不帶有"剛剛" 的意思。

參考以下網址吧 好清晰 有練習。

睇埋哩段更明白:
http://www.perfect-english-grammar.com/present-perfect-or-past-simple.html

我始終認為房間是否乾淨並無關係。

重點是你是否已經打掃過。