GRAMMAR
〜のも当然だ
no wonder
Explanation
NOTE
〜のも当然だ means no wonder X or it's only natural that X — used to say a result is completely expected given the circumstances.
あんなに勉強したのだから、合格するのも当然だ。
Since he studied that much, it's only natural that he passes.
The speaker presents the result as a logical, unsurprising consequence of a prior cause.
NOTE
The earlier clause usually gives a reason (with から, ので, or just context), and 〜のも当然だ confirms the result was bound to happen.
NOTE
Attach 〜のも当然だ to the plain form of a verb (食べる → 食べるのも当然だ, 怒る → 怒るのも当然だ).
STRUCTURE
V普
のも<ruby>当然<rt>とうぜん</rt></ruby>だ毎日練習しているのだから、上手になるのも当然だ。
Mainichi renshuu shite iru no dakara, jouzu ni naru no mo touzen da.
Since he practices every day, no wonder he gets better.
あんな失礼なことを言われたら、怒るのも当然だ。
Anna shitsurei na koto wo iwaretara, okoru no mo touzen da.
If someone said something that rude to you, it's only natural to get angry.
三日も寝ていないなら、疲れるのも当然だ。
Mikka mo nete inai nara, tsukareru no mo touzen da.
If you haven't slept for three days, no wonder you're tired.
Practice exercises
1
「誰でも褒められれば嬉しいものだから、彼が喜ぶのも当然だ。」
It's no wonder he's pleased, because it's natural for anyone to be happy if praised.
Answer
のも当然だのも当然です
2
「長年の研究の末だ。誇りに思うのも当然だ。」
It's a discovery after many years of research. It's no wonder one would be proud of it.
Answer
のも当然だのも当然です
3
「努力しないことには結果が出ないから、彼が落ちるのも当然だ。」
It's no wonder he failed, because unless you make an effort, you won't get results.
Answer
のも当然だのも当然です
4
「準備すべきだったのにしなかったから、失敗するのも当然だ。」
It's no wonder they failed, because they didn't prepare, even though they should have.
Answer
のも当然だのも当然です
5
「過度な期待をすれば、落胆するのも当然だ。」
If you have excessive expectations, it's no wonder you'll be disappointed.
Answer
のも当然だのも当然です