between a and b
between a and b は英検5級レベルの英単語で、「AとBの間」という意味があります。発音記号は /bɪˈtwiːn eɪ ənd biː/ です。
AとBの間
解説 Definition
AとBの間（に）；AとBの2つの選択肢やレベルの間を示す表現。物理的な位置関係にも、比較・選択の文脈にも使う。
Between A and B means in the space or position that separates two things, places, times, or choices. It is often used to describe location, relationships, or comparison. The phrase can be used literally or in a more abstract way.
覚え方のコツ Memory Tip
between は「A と B の二つをはっきり置き、その間を見る」形ごと覚えると定着しやすい表現です。A and B が両端、between がその真ん中というイメージ。場所なら sit between A and B、比較なら the difference between A and B、選択なら choose between A and B の形でよく出ます。ポイントは基本的に二者間で使うこと。三つ以上の中に埋もれる感じの among と混同しないようにすると整理しやすいです。
`Between` is best remembered with two clear points: A on one side, B on the other side, and something in the middle. That is why it works so naturally in patterns like `between A and B` and `the difference between A and B`. Keep it separate from `among`, which is more for three or more things around something.
例文
The coffee shop is between the library and the bakery.
その喫茶店は図書館とパン屋の間にある。
You must decide between the red plan and the blue plan.
赤いプランと青いプランのどちらかを選ばなければならない。
between a and b の類義語・関連語
between a and b の語源・成り立ち Etymology
betweenは古英語betwēonumから。be-（～のそばに）＋twēonum（二つ）で「二者の間に」が原義。関連語：two（二）、twin（双子）。語根に「2」が含まれるため、本来は二者間を指し、三者以上にはamongが使われる。
Between comes from Old English betweonum and is built around a root related to "two." Its earliest sense was specifically "in the middle of two things." That is why it is closely related in spirit to words like two and twin, even though modern English sometimes uses it more widely.
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