说说这句英文句子的问题

to改成in:

Mr.Smith has been IN China for nearly three years

have been in: 呆在某处

have been to: 去过某处
例句: Mr. Smith has been to China for three time.
Smith先生去过中国三次了

斯密斯先生已经去中国将近3年了

史密斯先生在中国呆了近三十年了

史密斯先生在中国呆了将近三年了