老師的回答是，因為兩個動作發生的時間差距太大，所以不能這樣用分詞放在一起。
詳細回答在：http://www.yentzu.idv.tw/discuss_detail.asp?b_type=&b_id=10683
※ 引述《sinequanon (暗戀水精靈)》之銘言：
: 轉貼 http://www.yentzu.idv.tw/discuss_detail.asp?b_type=&b_id=10683 上之問題：
: Neuroscientists, having amassed a wealth of knowledge over the past twenty
: years about brain and its development from birth to adulthood, are now
: drawing solid conclusions about how the human brain grows and how babies
: acquire language. 這是標準答案，劃線部分從Neuroscientists到are
: Neuroscientists have amassed, over the past twenty years, a wealth of
: knowledge about brain and its development from birth to adulthood, now
: drawing solid conclusions about how the human brain grows and how babies
: acquire language. 劃線部分Neuroscientists到adulthood,
: 這句為什麼不可以？是over the past twenty years修飾對象amass不佳，要修飾have
: amassed a wealth of knowledge語意比較適合嗎？
: 句尾分詞構句，是主要句子的補充說明或伴隨動作，那這裡的文法應該沒錯吧？
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