from overseas

問:"Overseas", as far as I am concerned, is an adjective or an adverb. If "from overseas" is a correct phrase, why is it grammatical? "From" is a preposition, and it should be followed by a noun, not an adjective, nor an adverb.

有人答:overseas could also means countries or territories across the sea or ocean.http://dictionary.reference.com/browse/overseas


參：http://english.stackexchange.com/questions/168652/why-is-from-overseas-grammatical?noredirect=1#comment350768_168652


我說:

Preposition is by definition followed by nouns only

但其實, 在from overseas, overseas 是副詞. 即使勉強說overseas是名詞,那from here又怎樣? over here呢?

根本以下這些都是介詞+副詞: from here, in there , over there, at once , until now , since when , at last , in brief , before long , by far

它們均是fixed expressions.