急.1.-IhavebeentoShanghaitwice.-Really?Whenhaveyoubeenthere?这个对话中有一个语法错误的地方,是哪里?请改正.

Question

急.
1.-I have been to Shanghai twice.- Really?When have you been there?
这个对话中有一个语法错误的地方,是哪里?请改正.

Answer 1

第二句,答语错了.
when 后应接具体动作,用于一般现在时、一般过去时、一般将来时等.如 when did you arrive there?
而 “have … been”则问过程、状态,是完成时的标志.如：
Have you ever been there?
How long have you been in the town?
这句话错将两种时态用词“when ”“have been”混用了.