Learn Japanese 101

O and De Particles

O(お) particle
↪The O(お) particle has a lot to do with "direct object".
So, according to the definition from Wikipedia; "Direct object is a traditional grammar that defines the object in a sentence as the entity that is acted upon by the subject.". So, basically direct object is the entity that occurs right after the verb. In Japanese, the direct object is followed by the particles O(お).

•Watashi wa okashi o mottekimasu.
  私は、おかし　お　持ってきます。
  I will bring the snacks.

•Watashi wa pan o kaimasu.
  私は、パン　お　買います。
  I will buy the bread.

•Oto-to wa manga o yondeimasu.
  弟は、漫画　お　読んでいます。
  My brother is reading a comic book.

•Kino- watashi wa tomato o kaimashita.
昨日　私は、トマト　お　買いました。
  Yesterday, I bought tomatoes.

~•~•*•~•~

DE(で) particle
↪The DE(で) particle is the one you can use to mark the location of activities. In English, this will be expressed by "at" or "in".

•Ani wa ginko de hataraite imasu.
  兄は、銀行　で　働いています。
  My older brother works at the bank.

*Watashi wa sono inu o ko-en de mitsukemashita.
私は、その犬お公園　で　見つけました。
I found the dog at the park.

*Notice that there are two particles in discussion are used in the sentence.
            The particle de(で) does not just mark the location of the activities but also marks the means by which the action is performed. For example, tools and methods. This is similar to "with", "on", "in", "by" in English.

•Watashi wa haha to denwa de hanashimashita.
  私は、母と　電話　で　話しました。
  I spoke to my mom on the phone.

•Kyou wa kuruma de kokoe kimashita.
  今日は、車　で　ここへ　来ました。
  I came here by car today.

•Watashi wa nihongo de hanasunoga sukidesu.
私は、日本語　で　話すのが　好きです。
  I like speaking in Japanese.