Begin with a situation rather than four English glosses
Tell Mocchi what the speaker is trying to do: give advice, request an action after an event, describe a regular result, or imagine a possibility. These intentions help identify a useful contrast. A chart where every form is translated as if does not show enough information to explain why a particular sentence sounds appropriate in its context.
Keep the first examples ordinary and concrete. Arrival, a phone call, a trip, and preparation are easier to arrange on a timeline than an abstract argument. Once the relationship is understandable, move to another context and check whether the same explanation still applies.
Compare a later action with advice about a premise
着いたら、電話してください asks for a call after arrival. 日本に行くなら、日本語を少し練習しておくといいです offers preparation advice on the premise that the listener is going to Japan. In the second example, the preparation is useful before the trip. Ask Mocchi to discuss that difference explicitly instead of assigning both sentences the same vague time relationship.
| Japanese | Romaji | Meaning |
|---|---|---|
| 着いたら、電話してください。 | Tsuitara, denwa shite kudasai. | Please call when you arrive. |
| 日本に行くなら、日本語を少し練習しておくといいです。 | Nihon ni iku nara, Nihongo o sukoshi renshū shite oku to ii desu. | If you are going to Japan, it is a good idea to practice some Japanese beforehand. |
State the timing before checking your answer
Explain which event has happened, which is only planned, and when the suggested action should occur. If that explanation is unclear, simplify the scenario before changing the grammar. A correct form chosen without a clear interpretation may be a guess; a clear interpretation with a mistaken form gives the tutor a more precise teaching opportunity.
Ask about alternative versions with their own contexts
Some sentences can use another construction with a changed emphasis or situation. Ask Mocchi to explain that context instead of treating every substitution as automatically impossible. At the same time, do not assume that two plausible translations make the Japanese versions interchangeable. Preserve the exact intention and ask what changes when the form changes.
Review the decision on another day
Save the kind of contrast you practiced, such as action after arrival versus preparation advice. At a later visit, request new events and explain them before choosing a form. Add other conditionals when the first distinction is usable, and consult a trusted grammar source when an unusual example remains uncertain. A gradual comparison builds a more dependable understanding than memorizing a broad shortcut that fits only the original pair.