slightly vs a little vs a bit の使い分け (3級頻出)
slightly=わずかに (書き言葉、フォーマル): "slightly different"
a little=少し (一般的、中立): "a little tired"
a bit=ちょっと (会話的、カジュアル): "a bit cold"
全て比較級・形容詞を弱める働き。
slightly + 比較級 は特に頻出 ("slightly better" "slightly more expensive")。
反対語の対
slightly ↔ completely / totally (程度の両極)。程度副詞の階段
slightly < a little < quite < very < completely (弱 → 強)。