Japatan
接續
- V辞書形 + 一方だ
解說
This shows that a change keeps going in only one direction without stopping. It follows the dictionary form of verbs of change, such as 増える, 減る, 上がる and 悪くなる. It is often used for bad situations, but it can also describe good or neutral changes, as in 人気が高まる一方だ.
例句
駅前にマンションが増えて、家賃は 上がる一方だ。
With more apartment buildings near the station, rents just keep going up.
練習を休んでいたら、体力は 落ちる一方だった。
While I was skipping practice, my stamina just kept dropping.
仕事が忙しくて、読んでいない本が 増える一方です。
I'm so busy with work that my pile of unread books keeps growing.
新しいアルバムが出てから、この歌手の人気は 高まる一方だ。
Since her new album came out, this singer's popularity has been rising steadily.
注意
It cannot be used with actions that are not changes, as in 毎日走る一方だ. ばかりだ is similar, but it is usually used for bad changes. Do not confuse it with 一方(で), which means "on the other hand" or "at the same time."
相關文法
小測驗
1最近、野菜の値段は（ ）一方だ。
答案與解析
答案: 4 上がる
一方だ follows the dictionary form of a verb. The sentence means "Recently, vegetable prices just keep going up."
2「〜一方だ」の使い方が正しい文はどれですか。
答案與解析
答案: 2 日本語の勉強を始めてから、知っている言葉が増える一方だ。
Knowing more words is a continuing change, so 増える一方だ is natural: "The number of words I know keeps growing." Jogging, tomorrow's rain and tasty cake are not ongoing changes.
3駅の近くに大きなスーパーができてから、この店の客は（ ）で、店長は困っている。
答案與解析
答案: 1 減る一方
減る一方で means "keep decreasing, and..." The sentence means "Since a big supermarket opened, this shop keeps losing customers, and the manager is worried." The other choices are not grammatical here.
