UNC Chapel Hill among the first and largest schools to reopen for in-person classes was also one of the first to reverse course,

sending students home to complete the 百度競價推廣ester online after just 130 covid-19 cases were reported.

為何這里用了非謂語to reopen ? 而不是reopening ? 這里用to reopen的意義？

序數詞+名詞+to do不定式作定語，名詞與不定式之間為邏輯主謂關系，這個不定式表示的動作是已經發生過的動作，即to do是to have done的簡略形式。假如改用定語從句，則從句要用完成體。

the first and largest schools to reopen for in-person classes 常用

= the first and largest schools to have reopened for in-person classes 較為少用。

= the first and largest schoolsthat havereopened for in-person classes 常用

用目前分詞是沒道理的。你為何要用目前分詞作定語？？？