Definition: The Sentences are groups of words that are used together to express a certain idea; in Japanese the sentence have a special structure you can see below.
Subject + Complement + Verb For example in the sentence: I play soccer
in Japanese this are: 私 は サ ッ カ ー を す る (Watashi wa sakka o suru)
私 (Watashi) = I
サ ッ カ ー(sakka) = Soccer
す る(suru) = Play
and
は(wa) = This word is put after the subject for indicate who is the subject
を(o) = This word is put after the subject for indicate who is the Complement
Examples:
Miguel eats cake in the morning.
ミ ゲ ル は 、 午 前 中 に ケ ー キ を 食 べ る
Migeru wa, gozen-chū ni kēki o taberu.
You play the guitar very well.
あ な た は 非 常 に よ く ギ タ ー を 弾 く
Anata wa hijō ni yoku gitā o hiku.
She danced all at night.
彼 女 は 夜 に す べ て を 踊 っ た
Kanojo wa yoru ni subete o odotta.
For the interrogative form in Japanese you must add the word ka to finish of sentence.
Subject + Complement + Verb + ka
Examples
Juan is here?
フ ア ン は こ こ で す か ?
Fuan wa kokodesu ka?
Do you like chocolate?
あ な た は チ ョ コ レ ー ト が 好 き で す か ?
Anata wa chokorēto ga sukidesu ka?
What time is it?
今 何 時 で す か ?
Ima nan-jidesu ka?