Particles
Particles are probably one of the most difficult and confusing aspects of Japanese sentences. A particle (joshi) is a word that shows the relationship of a word, a phrase, or a clause to the rest of the sentence. Some particles have English equivalents. Others have functions similar to English prepositions, but since they always follow the word or words they mark, they are post-positions. There are also particles that have a peculiar usage which is not found in English. Most particles are multi-functional.
Wa VS Ga
Frequently Asked Questions
Particles are probably one of the most difficult and confusing aspects of Japanese sentences. Among particles, the question I am often asked is about the use of "wa(は)" and "ga(が)." They seems to make many people confused, but don't be intimidated by them! Let's have a look at the functions of these particles.
Topic Marker and Subject Marker
Roughly speaking, "wa" is a topic marker, and "ga" is a subject marker. The topic is often the same as the subject, but not necessary. The topic can be anything that a speaker wants to talk about (It can be an object, location or any other grammatical element). In this sense, it is similar to the English expressions, "As for ~" or "Speaking of ~."
Basic Differences Between Ga and Wa
"Wa" is used to mark something that has already been introduced into the conversation, or is familiar with both a speaker and a listener. (proper nouns, genetic names etc.) "Ga" is used when a situation or happening is just noticed or newly introduced. See the following example.
In the first sentence, "ojii-san" is introduced for the first time. It is the subject, not the topic. The second sentence describes about "ojii-san" that is previously mentioned. "Ojii-san" is now the topic, and is marked with "wa" instead of "ga."
Wa as Contrast
Beside being a topic marker, "wa" is used to show contrast or to emphasize the subject.
The thing being contrasted may or may not stated, but with this usage, the contrast is implied.
Particles such as "ni(に)," "de(で)," "kara(から)" and "made(まで)" can be combined with "wa" (double particles) to show contrast.
Whether "wa" indicates a topic or a contrast, it depends on the context or the intonation.
Ga with Question Words
When a question word such as "who" and "what" is the subject of a sentence, it is always followed by "ga," never by "wa." To answer the question, it also has to be followed by "ga."
Ga as Emphasis
"Ga" is used for emphasis, to distinguish a person or thing from all others. If a topic is marked with "wa," the comment is the most important part of the sentence. On the other hand, if a subject is marked with "ga," the subject is the most important part of the sentence. In English, these differences are sometimes expressed in tone of voice. Compare these sentences.
Ga in a Special Circumstance
The object of the sentence is usually marked by the particle "o," but some verbs and adjectives (expressing like/dislike, desire, potential, necessity, fear, envy etc.) take "ga" instead of "o."
Ga in Subordinate Clauses
The subject of a subordinate clause normally takes "ga" to show that the subjects of the subordinate and main clauses are different.
Review
Now let's review the rules about "wa" and "ga."