谁能告诉我：为什么主语是单三时，动词后要加s?
Posted by davita3009
December 28, 2009 in the Group General Discussion .
请从语言学的角度来说明，我正在思考英语和汉语的发展过程的对比？QQ:592960363 or tgw3009@yahoo.com
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