Learning objectives
- Lesson goals: A state or change continues in one direction — often worsening.
- Form and connection: [Verb辞书形] 一方いっぽうだ
- Nuance in real use: 一方だ marks an irreversible trend—like a stone rolling downhill, it only goes one way.
Form and connection
Core Explanation
A state or change continues in one direction — often worsening.
Cultural Note
Practical examples
Common pitfalls
Build the base form before adding the pattern
Complete the required conjugation first. Do not keep polite and plain endings at the same time.
Match politeness to the situation
The examples are reliable starting points; relationships and context can still change the most natural wording.
Practice and answers
Show answer
[Verb辞书形] 一方いっぽうだShow answer
Prices keep rising.Show answer
成績せいせきは下さがる一方いっぽうだ。 ([Verb辞书形] 一方いっぽうだ)Continue learning
Tsutsu Aru: In the Process Of
A change is gradually happening — written-style progressive. This lesson combines form, context, examples, common mistakes, and practice so you can use the pattern in real communication.
Hoka Nai: Have No Choice But
"There is no option but to..."—more formal than しかない. This lesson combines form, context, examples, common mistakes, and practice so you can use the pattern in real communication.
Complete Guide to Plain Forms: Linking Ideas, Quotations, and Judgments
Learn the plain forms of nouns, adjectives, and verbs and use them to modify nouns, quote speech, express time and reasons, state plans, make judgments, and build indirect questions.