Japanese from zero · N2 Lesson 25
Minju's offer
〜に決まって いる ・ 〜に相違ない ・ 〜ことだから ・ 〜も当然だ/〜て当然だ/〜のももっともだ
In this lesson, you will learn to say something is bound to be so with 〜に決まって いる, to state a firm conclusion in writing with 〜に相違ない, to make a guess from what you know of someone with 〜ことだから, and to say a reaction is only natural with 〜のも当然だ, 〜て当然だ and 〜のも もっともだ. It is late December, and Minju has news from a company in Seoul.
By the end you will be able to say
ミンジュの ことだから、受かるに決まって いると 思って いた。Knowing Minju, I was sure she'd pass.
両親が 喜ぶのも 当然だ。It's only natural that her parents are happy.
迷うのも もっともだ。It's understandable that she can't decide.
これは いい 会社に相違ない。This is without doubt a good company.
毎日 練習すれば、上手に なって 当然だ。Practice every day, and of course you'll get better.
The grammar in this lesson
- 〜に決まって いる — is bound to; of course it's — The plain form or a noun + に決まって いる says the speaker is sure something is so.
- 〜に相違ない — without doubt (written) — 〜に相違ない is the formal, written way to say 'there is no doubt that'; in talk, に 違いない.
- 〜ことだから — knowing (someone) — A person + の ことだから says 'knowing what they are like', then makes a guess about what they will do.
- 〜のも当然だ / 〜て当然だ / 〜のも もっともだ — it's only natural — 〜のも 当然だ and 〜て 当然だ say a result is only natural; 〜のも もっともだ says a reaction is understandable.