indicates the subject of a sentence
indicates possession
but; however; (and) yet; though; although; while
and
used after an introductory remark or explanation
regardless of ...; whether ... (or not); no matter ...
indicates a desire or hope
softens a statement
indicates doubt
indicates scorn
外で雨が降っています。
It is raining outside.
日本語が話せるようになった。
I became able to speak Japanese.
誰が来るのか分からない。
I do not know who will come.