I have been to USA for 3 years 这个句子矛盾吗?

I have been to USA for 3 years 这个句子矛盾吗? i have been the usa 3 years ago 还是i have been the usa for 3 I have been to Beijing on business for 3 years.该句正确吗? I have been coming to Beijing for 15 years i have been to shanghai for three years.I have been in shang I have been ()teapots for fifteen years I have been skating for 3 years.=I have _____ _____ I came h 划线提问2I have been to shanghai for ten years. 划 to shanghai,特殊 这个句子We have been studying English for whole the ten years.有什 I have been in china for two years.这句子哪儿错了 这个英语错在哪儿i have been teaching here for 30 years when you grad I have joined the Part for 3years .I have been a member of t