The Achaemenid empire of Persia reached the Indus Valley in the fifth centry BC, with it the Aramaic Script, [from which derive both the northen and the Southern India alphabets]. 后面的定语从句,谓语用的复数derive。那这么理解从句的主语应该是后面的the northen and the Southern India alphabets,那就是说整个从句倒装。。
恩 是的呢~整个句子的倒装 主语是后面的both the northen and the Southern India alphabets 这个句子的正常语序应该是both the northen and the Southern India alphabets derive from which 因为怕which离先行词太远了指代不清,所以将which提前啦