自1997年以来他已经去过上海三次了英语翻译 He has been to Shanghai three times since 1997/the year 1997。He has gone to Shanghai and has not come back.前一个是说去过那儿2113了5261，现在不一定4102在那儿。后一个是说他去那儿了，现在就在那儿，1653这个表达中不能体现他去过几次，要表达去过几次只能用have been。
英语翻译 如果是没有回来的话，就是He has gone to Shanghai.这里用现在完成时强调他已经去了但是没有回来.
英语翻译：他已经离开上海3天了。 he has left shanghai for 3 days.
