Explanation
Use "-er" with short adjectives to compare two things.
In "This room is bigger than that one," "This room" is the thing we talk about, and "is" links it to the adjective. "Bigger" is the comparative form of "big," so it shows a difference in size. "Than that one" shows what we are comparing with. Japanese often uses "より" and keeps the adjective the same, but English changes the adjective word itself.
短い形容詞は、2つのものを比べるときに "-er" をつけます。
たとえば "This room is bigger than that one." では、"This room" が話題のものです。"is" は主語と形容詞をつなぎ、"bigger" は "big" の比較級で、広さの差を表します。"than that one" は、何と比べているかを示します。日本語では「より」を使って形容詞を変えないことが多いですが、英語では形容詞そのものが変わります。
Examples
- My bag is lighter than yours. 私のかばんはあなたのより軽いです。
- This room is bigger than that one. この部屋はあの部屋より広いです。
- Is your phone newer than mine? あなたのスマホは私のより新しいですか。
- Today is colder than yesterday. 今日は昨日より寒いです。
- This road is not wider than the other road. この道はもう一方の道より広くありません。
- Her brother is taller than she is. 彼女のお兄さんは彼女より背が高いです。
Common Mistakes
Japanese learners often add "more" with short adjectives, like "This room is more bigger than that one." The correct form is "This room is bigger than that one." Do not use both "more" and "-er" together.
日本語話者は、短い形容詞に "more" を足してしまうことがよくあります。例えば "This room is more bigger than that one." は誤りで、正しくは "This room is bigger than that one." です。"more" と "-er" を両方同時に使わないようにします。