〜が

Pattern: 〜が
Level: N5
Reading: が
Meaning: Subject marker / focus particle
Attaches to: Noun
Nuance & register: Neutral, grammatical marker of the subject.
Example: 雨が降っています。 It is raining.
Easily confused with: 〜は (wa) - 'ga' highlights the subject itself as new information, while 'wa' marks the topic.