[問題]OG(11th)2

[Emilyh]

2.Of all the vast tides of migration that have swept through history, maybe none is more concentrated as the wave that brought 12 million than three decades.

OG解釋說" the verb used in comaparative construction must also be past tense, X(none) was more"

為什麼一定要用過去式呢?

謝謝

[evelyn_yeh]

因為"have swept through history"明示了要用過去式......