……intohisjaw——havingextractedthemfromthe……..请问破折号后用现在完成时是什么语法?Hehiredadentisttotransplantnineteethintohisjaw——havingextractedthemfromthemouthsofhisslaves.不明白这里破

Question

…… into his jaw——having extracted them from the ……..请问破折号后用现在完成时是什么语法?
He hired a dentist to transplant nine teeth into his jaw——having extracted them from the mouths of his slaves.不明白这里破折号里的语法现象.
不解一：如果having done表示这里的动作发生在主句动作之前,那么如何判定是在hire之前,还是在transplant 之前,根据逻辑,肯定是transplant,但是从语法上如何判定?这里主干的主语只是he,而having done之所以用现在分词,就是因为省略了主语,表示两个动作都是主语做的,这个句子用一个破折号就可以表示是dentist做的了吗?总觉得这破折号用得随便,当然,我英语超烂的那种.
不解二：这句话能否改成如下?He hired a dentist to extract nine teeth from the mouths of his slaves and transplant them into his jaw then.在英语表达里,then是放句尾好,还是and后就放then好呢?
不解三：这句话还可以这样改吗?Having extracted nine teeth from the mouths of his slaves,the dentist hired by him transplanted them into his jaw.
不解四：一个和本句无关的语法问题,这里是现在完成时和一般过去时并列,那么现在完成时能否和一般现在时并列呢?如果有,请举例说明.

Answer 1

1.主从句时态规则：从句一般简化；如用复杂时态往往是强调,本句从句用分词完成时就是要说明他植入的9颗牙是预先从奴隶嘴里拔出的having extracted在 transplant之前
2.分词逻辑主语不一定就是主句主语,可以是宾语或所有格,语法称作分词的悬垂结构
3.and then 好些
4.可以改成你写的句子,但主角转移了,成牙医了!
5.当然可以
i am here and i have been here ever since you was a kid.