单句改错He is talking so much about America as if he has been there

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单句改错He is talking so much about America as if he has been there
单句改错He is talking so much about America as if he has been there

单句改错He is talking so much about America as if he has been there
把has改成had

He takes so much about America as if he had been there,
前面表述的是客观所以用一般现在是式,好像他去过美国一样,是虚拟语气,所以用had.