Introducing two words — それじゃ and さて — that are used at the beginning of sentences.
Introducing 理由 (riyū) and 原因 (gen'in), words that have similar meanings.
Introducing the proper use of Xんですから、Y and Xんですけど、Y.
Introducing のだ, a phrase that is frequently used in daily conversation but has no good translation in English.
Introduce the basic meanings and uses of compound verb structures V上(あ)がる and V上(あ)げる.
Introducing the proper use of the sentence-ending particles of な(あ) and ね(え).
Introducing two words that distinguish between feelings of relief and safety.
Introducing two adverbs that show the near future, そのうち and 今に.
Introducing how to use Xなら、Y, meaning "if X, Y" or "if it is the case that X, Y."
Introducing two expressions, ぼんやり and ぼうっと, that indicate someone or something is dim, distant or vacant.