名詞・形容詞・副詞 全10語
まぎらわしい対：いつも複数形で使う名詞
この2つは混同しやすいため、必ず対にして確認してください。
| 語 | 正しい形 | よくある誤り |
|---|---|---|
| sheep | two sheep | two sheeps |
| fish | three fish | three fishes（種類を言うときのみ可） |
| salmon | two salmon | two salmons |
| deer | several deer | several deers |
| species | a rare species / many species | a specie |
| series | a series of events | a serie |
| aircraft | five aircraft | five aircrafts |
| means | a means / two means | a mean |
| corps | the medical corps | the medical corpses（まったく別語） |
| headquarters | the headquarters is / are ~ | the headquarter |