Japanese Learning: Difference between Wa-Ga Construction sentence and Transitive Verb predicate sentence

This series have explained “Wa-ga construction” for several days, because the Japanese textbook “Minna no Nihongo” is dealing with “Wa-ga construction” in Chapter 9. And it is not only an introduction of “Wa-ga construction”, also an introduction of particle “ga”. If you were introduced particle “ga” through “Wa-ga construction”, you might think that the particles “wa” and “ga” could coexist in a sentence. Yes, they can be in a sentence together if the sentence is Wa-ga construction, but most of the time you have to choose one of the two (wa or ga) for subject in a sentence.

1. Watashi wa Nihonjin desu. (I am Japanese.)

2. Watashi ga Nihonjin desu. (I am the person who is Japanese.)

In the both sentence 1 and 2, the subject is “Watashi”. But the subject marker in 1 is “wa”, while the subject marker in 2 is “ga”. How do you properly choose “wa” or “ga” for a subject? The exact explanation would be lengthy. For the simplicity, let me say as below.

– When the predicate is the important information, use “wa” for subject marker.

– When the subject itself is the important information, use “ga” for subject marker.

Anyway, sticking to “Wa-ga construction” would cause a huge damage on your sense about Japanese. The followings are quiz about Wa-ga construction sentences that use verbs for predicate and Verb predicate sentences. Choose “ga” or “o”. And answer the type of verb.

1. Watashi wa Okane { ga or o } arimasu. (I have money.)