Question

狸

英文の構造がつかめないので、解説お願いします。
It is not until that になっていないのもよくわかりません😭

Not until the experiment was completed did the researchers realize
the importance of the data that the assistant, who had joined the team
only recently, had collected.

Answer 1

✨ ベストアンサー ✨

ゲスト

(Not until ～completed) did the researchers realize ～ the data that the assistant, who ～ recently, had collected.

(Not until ～completed) の否定の副詞節が文頭に出ていて、倒置の文(did the researchers realize ～)になっています

先行詞 the data に制限用法の関係代名詞節(that the assistant ～ collected)がかかっています

制限用法の関係代名詞節(that the assistant ～ collected)の中で、the assistant を先行詞とする非制限用法の関係代名詞節(who ～recently) が挿入されています

not ～ until ⋯「～して初めて⋯する、～まで⋯しない」と訳せます

It is ～ that ⋯. の強調構文を使って書き換えて、
It was not until the experiment was completed that the researchers realized ～ the data that the assistant, who ～ recently, had collected.
も同じです

The researchers did not realize ～ the data that the assistant, who ～ recently, had collected until the experiment was completed.
が元の文です

ゲスト

訂正します🙏
not ～ until ⋯「～して初めて⋯する、～まで⋯しない」と訳せます
↓
not ⋯ until ～「～して初めて⋯する、～まで⋯しない」と訳せます

Answer 2

ととろ

The researchers realized (= did realize) the importance of the data that …,
が主文で、主語とdid が倒置されていて、
それが
not until the experiment was completed
だった、ということだから
Until the experiment was completed,
the researchers did not realize…
という感じ

ととろ

文法の約束事を几帳面に守れば
It is not until the experiment … that the researchers …
なのかもしれませんが、この形もよく見かけます