1. 英語の前置詞「in」「on」「at」は、実はとっても論理的！

多くの日本人が悩む英語の前置詞。実は、とってもシンプルで論理的なルールがあるんです。それを今日はひとつだけご紹介します。

1. The English prepositions "in," "on," and "at" are actually very logical!

Many Japanese people struggle with English prepositions. However, there are actually very simple and logical rules for using them. Today, we'll introduce just one of these rules.

2. そのイメージを掴もう：空間の「広がり」で考える

(そのイメージをつかもう：くうかの「ひろがり」でかんがえる)
「in」「on」「at」を訳すのではなく、それぞれが持つ「空間的なイメージ」で理解しましょう。このイメージさえ掴めれば、使い分けは簡単です。

2. Grasp the underlying concept: Think in terms of "space"

(Grasp the concept: Think about it in terms of "space")
Instead of trying to translate "in," "on," and "at," let's understand them based on their "spatial meaning." Once you grasp this concept, using these prepositions correctly will be easy.

3. 広い空間を表すのは « in »

(ひろいくうかんをあらわすのは « in »)
« in » は、箱やエリアなどの「広がりを持った空間の中」をイメージします。
例: in the room (部屋の中), in the park (公園の中で), in Tokyo (東京の中で)

3. "In" is used to indicate a larger, enclosed space.

("In" is used to describe being inside a larger, enclosed space.)
"In" conveys the idea of ​​being inside something that has dimensions, such as a box or an area.
Example: in the room, in the park, in Tokyo

4. 平らな表面を表すのは « on »

(たいらなひょうめんをあらわすのは « on »)
« on » は、床やテーブルなどの「平らな表面と接している」イメージです。
例: on the floor (床の上), on the table (テーブルの上), on the wall (壁に*貼っている)

4. "On" is used to indicate a flat surface.

("On" is used to describe being on a flat surface.)
"On" conveys the idea of ​​being in contact with a flat surface, such as the floor or a table.
Example: on the floor, on the table, on the wall (attached to the wall)

5. ポイントを表すのは « at »

(ポイントをあらわすのは « at »)
« at » は、地図上のポイントのような「特定の地点」をイメージします。広さは関係ありません。
例: at the station (駅で待ち合わせ), at home (家にいる), at the door (ドアのところで)

5. "At" is used to indicate a specific point.

("At" is used to express a specific point.)
"At" conveys the idea of ​​a specific location, like a point on a map. The size of the location is irrelevant.
Example: at the station (meeting at the station), at home (being at home), at the door (standing at the door)

6. 今日のまとめ：大きさで使い分ける「in → on → at」

(きょうのまとめ：おおきさでつかいわける「in → on → at」)
in (広いエリア) → on (表面) → at (ポイント)
このイメージで、I am __ the bankという文章も、「銀行の中にいる」(in)なのか、「銀行という地点にいる」(at)なのかで、自然に前置詞が選べるようになります！

6. Today's summary: Using "in," "on," and "at" based on size

(Today's summary: Using "in," "on," and "at" depending on size)
in (a large area) → on (a surface) → at (a point)
With this understanding, you can naturally choose the correct preposition in sentences like "I am __ the bank," depending on whether you mean "inside the bank" (in) or "at the location of the bank" (at).