「前文までの‹過去›の事象に対して、後文で『その背景となる‹大過去›の事象』を出す」という展開パターンの過去完了
My bike was not there. Someone had stolen it.
→ 私の自転車はそこになかった。___________。
She was scratching her body like crazy. A mosquito had bitten her in more than ten places.
→ 彼女は身体をかきまくっていた。_____________。
Suddenly there was a loud bang. Everyone turned around. Someone had fired (× fired) his gun. All the guests panicked.
→突然バンという大きな音がした。_________________。客は皆パニックになった。
Optimized studying based on the forgetting curve vastly improves memorization. - What is reminDO?
Memorize
