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One question per page, answered in the first two sentences, then shown to be true. Every claim here is tied to something checkable — the official exam materials, a dictionary, or our own question bank of 14,035 items.
- Why is the て-form of 行く 行って and not 行いて?行く is the one everyday Group 1 verb ending in く that takes って instead of いて. Every other く-verb follows the rule — 書く becomes 書いて, 聞く becomes 聞いて — which is exactly why 行く catches people out.
- When do I use いる and when do I use ある to say something exists?いる is for things that move under their own power — people and animals; ある is for everything else, including plants. The split is animacy in that sense, not being alive, which is why 木がある is correct and パンダがある is not.