i have been the usa 3 years ago 还是i have been the usa for 3 years ago

i have been the usa 3 years ago 还是i have been the usa for 3 years ago

题目
i have been the usa 3 years ago 还是i have been the usa for 3 years ago
我三年前去的美国,.
答案
首先,USA前面应该加the.
I have been to the USA 3 years ago 是对的i have been the usa for 3 years ago为同意句
意思为:我三年前到过美国
I have been in the USA for 3 years
我在美国3年了
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