不能互换,前者是问多少次,后者是说多久一次,而且应该是how many times 而不是how many time .例如你去过北京多少次?How many times have you been to Beijing?回答twice .或者I have never been to Beijing.下一个例如问你多久看一次电影.How often do you see a film 回答once a week .或者not too often .或者never .