✔ 最佳答案
Such poets as Milton are rare. = Poets such as Milton are rare.(名詞Milton)
No machine can work without a fuel such as coal or oil. (名詞coal/oil)
such (...) as = 像...這樣的東西
as是介系詞,後面的字是其「受詞」,只能用「名詞」性質的字。
所以你的例句裡的「動名詞」都是動詞所衍生的,有名詞性質,才當介系詞as的受詞(動詞是不能當受詞用的):
being late for class 是一個狀態
going to class unprepared是一個行為