２課

The expressions "とおりだ" and "とおりに" mean "as expected," "just as," or "in the way that," indicating that something happens or exists in the manner previously described, observed, or imagined.

The expressions "によって" and "によっては" are used to indicate that an outcome, state, or action varies based on a certain condition, method, or individual difference.

The phrase "たびに" is used to express the idea of "every time" or "whenever," indicating that a certain action or state consistently occurs each time another action takes place.

The pattern "〜ば〜ほど" is used to express that the degree or extent of one thing increases as another thing also increases. It conveys the meaning of "the more...the more..." or "the more something happens, the more a certain outcome occurs."

The expression "ついでに" is used to indicate that while doing one main activity, you take the opportunity to do an additional, related action.