Japanese Particle Practice Generator

Two textbook example sentences look almost identical, これは本です and これが本です, and a beginner reads both as "this is a book" with no sense of why a native speaker would ever choose one over the other. は marks the topic, what the rest of the sentence is actually about, and shifts the listener's attention to whatever comes after it. が marks the grammatical subject and points at whatever comes before it, often introducing something new or answering an unspoken who or what. Mix them up and a sentence stays technically parseable but sounds subtly wrong in a way that's hard for a learner to diagnose alone, since both particles get glossed as "is" in early lessons and the real difference never gets addressed head on.

Particle focus is [PARTICLE_FOCUS:select:は vs が (topic vs subject),を (direct object),に (direction, time, and indirect object),で (location of an action, means, and instrument),Mixed practice across all five]. JLPT level is [JLPT_LEVEL:select:N5,N4,N3,N2,N1]. I need [DRILL_COUNT:number:10-40] items.

For は versus が, build minimal-pair sentences that only differ by the particle, and explain for each pair whether the sentence is introducing new information, answering an implied question, or commenting on something already known to both speakers, since that's the actual test for which particle fits, not a fixed rule tied to any single verb or sentence type.

For を, mark the noun receiving the verb's action directly, 本を読みます, reading a book, and keep it distinct from に, which points toward a destination, a time, or the receiver of an action rather than the thing being acted on directly. For で, cover both senses in the same drill set when relevant, the location where an action physically happens, レストランで食べます, eating at a restaurant, and the tool or method used to do it, 箸で食べます, eating with chopsticks, since a learner who only sees one sense of で tends to assume it never covers the other.

If a specific context or theme helps, name it in [CONTEXT_THEME?], otherwise build sentences around common daily situations appropriate to the chosen JLPT level. Close the set with two or three tricky は/が pairs pulled from natural speech, not invented minimal pairs, since real usage is where this distinction actually gets tested.